It would be a pass from me. The specs look good until you see the design.
If the product pictures are accurate, it looks like some sort of strange mobile/laptop and desktop crossover design.
It claims a desktop CPU and GPU but a 14900 and 4070 desktop could draw 700W of power and it uses an external power brick. A quick search for a 700W external power supply yields only internal PSU models.
It uses SO-DIMMs.
It lists only HDMI 2.0 ports despite claiming a 4070 GPU. Maybe this is just a promotional error?
It's using laptop style blowers to try and cool supposed desktop parts that would draw far more power. If it's not throttling like mad, I expect it to be loud.
I'm sure the system will work. I'm just not sure I trust it to live up to it's claimed component levels. If you must have that form factor, then I guess it will be what it will be.
Personally I would go with something that uses a more traditional desktop style component build if I was looking to get the full performance of the build.
Something more along the lines of the results here:
Shop Slim/Small Form Factor,NVIDIA GeForce RTX 40 Series Gaming Desktop PC on Newegg.com. Watch for amazing deals and get great pricing.
www.newegg.com
This one has your 14900F and a 4070:
Buy 2023 ASUS ROG G22CH Gaming Desktop PC, Small Form Factor, Intel Core i9-14900KF, NVIDIA GeForce RTX 4070 DUAL, 1TB SSD Gen 4, 32GB DDR5 RAM, Windows 11, G22CH-DH978 with fast shipping and top-rated customer service. Once you know, you Newegg!
www.newegg.com
If it wasn't for the (assumed) need to drive games at 4k 60fps or better, I would say you could probably step down a model or two but the GPU demand there tends to push you up into the higher packages. If you're playing mostly older games, a 4060ti model would probably do.