Cooler Master MasterBox Q300L Micro-ATX Tower with Magnetic Design Dust Filter, Transparent Acrylic Side Panel, Adjustable I/O & Fully Ventilated Airflow, Black (MCB-Q300L-KANN-S00)

I just built a PC for my daughter using this case, and as long as you're not going overboard with components, there's plenty of room. We used an mATX motherboard, and the case comes with a single 80mm fan in the rear. There's easily space for three more 120mm fans — possibly four, depending on your motherboard clearances. Airflow seems perfectly adequate, and the included dust screens are a nice touch.The motherboard tray is well-designed, with several pass-throughs in the corners and bottom. We routed all the cables behind the tray and back through to the motherboard, which made for a very clean build. RGB fans shine through well — lighting visibility is decent.This is a great budget case, but keep in mind that at this price point, the metal is thin. Don’t drop it or lean on it too hard — it can bend out of shape easily. I know some people knock the lexan panel, but if you keep your hands off it and use a microfiber cloth to clean it, you’ll be fine. Just avoid anything abrasive or it will scratch.We did run into a minor issue where the power button didn’t work initially — flipping the header on the motherboard resolved it. One other small gripe: the USB ports on the side panel are too close to the power button. If you plug in a USB stick near the power button, it’s very easy to accidentally shut off the PC — I did this a few times.Despite those quirks, there’s not much to complain about at this price. It’s a nice little case with good functionality and solid value.

This is fantastic case given that it is only $40.Pros:The priceComes with an exhaust fanLots of cable management space in the backNice SSD mounting hardwareMoveable side/front IOIt's wide enough for big CPU coolers. Yay!It's black.Has dust filters.Cons:It's cramped at the top of the case. My second case fan didn't fit properly.The front IO cables are unwieldy.Acrylic side panel not as nice as tempered glass.The metal is a bit flimsy. Not bad though.Overall, I really like it. You cannot beat the price at all. Solid work here from Cooler Master. Definitely go for 140mm fans if you don't have any fans already! My 120mm ones look goofy in there. Another thing to note: the case doesn't have very many places to hide extra cables so modular PSUs will look way better in it than non-modular ones.(bonus: It pairs nicely with the Thermalright x120 coolers.)

I picked up the Cooler Master Q300L V2 to use with my Plex server. I was looking for an inexpensive case that would not take up too much space but looked good. This fit the bill.Pros:- Ample space for cable management behind the motherboard tray- Compact design- Space for a 240MM AIO (front mount)- Tempered glass side panel- Plenty of cable pass-throughs- Supports 120 and 240 MM fans- Front panel USB C- Can be used both vertical and horizontalNeutral:- Pre-drilled fan holes smaller than most case fan screws (120 mm fans)- Some restrictions on component sizeCons:No basement"pop-out" PCI slot coversMetal feels flimsy (it held up fine for the build, but I could easily see it getting bent if I wasn't careful)Included case fan is very basicThe Cooler Master Q300L V2 is a good choice if you are looking for a compact case at a budget price. The case is similar to the $20-dollar cheaper original Q300L (and uses the same chassis) but adds a USB-C connection to the front panel and replaces the acrylic side panel with tempered glass. They also updated the magnetic filters to a new design. There is plenty of room behind the motherboard tray for cable management and disk drives - there are mounts for one 3.5" and two 2.5" drives.Additional case fans are a must as the air holes in the case walls are much smaller than the printed side of the magnetic filter would have you believe. I bought a 5-pack of Antec P12 120MM fans to go along with this case and mounted two front intake, one rear exhaust, and two top exhaust. That, along with my CPU cooler (Cooler Master 212 Hyper Black Edition) does the trick. Idle temps are around 35-36 Celsius for a Core Ultra 7 265k using stock settings with a 24 Celsius (75 Fahrenheit) ambient room temp. Under load (Cinebench R23 multi-core test) some cores peaked at about 82 Celcius but in general the package was in the high 60s to mid 70s. While the pre-drilled fan holes were too small for the fan screws, the case air holes were perfectly sized and actually provided more flexibility for fan mounting.There are some restrictions on component size, but they are well documented. I did not have any issues fitting any of my parts. I did see in an online review (and verified with my build) that even though you can fit a bottom fan in the case, depending on the size of your PSU the cables may be in the way.Building in this case was OK. The lack of a removable top and the limited space once components were added made running some wires more difficult. I will note that if I had to do it again I would have added components in a different order. For example, with the PSU installed it was harder to connect the back-of-system plugs (HD audio, fans) to the MicroATX board I used as it was very close to the connecters and limited the approach.All in all, I would recommend this case if you are in the market for a good looking, inexpensive, compact case for a budget or even mid-range build.

Great for the money, as it is a very inexpensive case. Only thing I don't prefer: power-button/headphones panel on the side works OK, but moves a bit when you plug stuff in or push button firmly. Also, case feet are too short (putting inlet for psu too close to surface computer is on). I put foam pad under each case foot to raise it. It has excellent dust filters -- just the way I like them best. You will need to get a couple of case fans to mount on the front. I like the Arctic p12's for high quality, but am trying out some Thermalright tl-c12c's (cheap). Case is so good for the money that I bought another one for another build.