Very good product, efficient and quiet
Very powerful and quiet NUC, a great feat by Intel to allow a powerful machine in such a small package.
It's tight, but the CM ventilates well (hot air comes out the top), and the CG has no trouble cooling itself either. Intel has managed the airflow well.
The 2019 motherboard is still very current and allows for some very good components (up to 64GB RAM, M2 NVME, Wifi6 and Bluetooth 5), with plenty of USB, USB-C and even a MicroSD port.
The CM comes with a video card that does the job very well if you're not gaming (it handles my 34" non-4K screen very well). However, if you do need one, you'll have to go on a quest to find the right size graphics card (watch out for the length and thickness!).
In my case, I was lucky enough to find a Dual GeForce RTX 3060 OC Edition.
Fortunately, Intel has a compatibility list for its NUCs, and I advise you to stick to this list for the graphics card: https://compatibleproducts.intel.com/ProductDetails?EPMID=190107
It's a pity that Intel doesn't keep this size for its new NUC versions...