All fair and good to those who want to blow their cash on one of these - I certainly do not care where people spend their money.
I do, however get a little annoyed at people selling garbage that their customers will only have problems with. There is no room for debate. A 120 watt PSU is not enough. It just isn't, and there are going to be all sorts of problems.
That 120 watt PSU isn't even HALF of what a basic mini itx i3/i5/i7 board with integrated gfx requires when it's all assembled with drives in full computer form.
Basic i3 Mini-ITX with 1 HDD, one optical drive, the add on wifi module, plus the fans that come with the case will pull well over 250 watts under 95% load. This doesn't even factor in USB devices, etc.
I've built. worked on and sold 100's of custom made high end PC's, and I find it appalling that they would knowingly sell something like this with a 120 watt PSU like that.
EDIT: The Intel i7 2700k (Sandybridge, LGA1155, 4 core/8 thread, 8 MB cache, 3.50 GHz, 32 nm) has a 95 Watt TDP. This is the CPU they offer in the high end Amiga Mini that also contains the 120 watt Power Supply Unit.