Wanted to put in my two cents here - I recently received the Atari 12 game version from Best Buy (after 10% birthday discount, I couldn't resist). The price was right and its rock solid so far. Having sold off a lot of the classic arcade games I had amassed over the years, this machine is bringing back a lot of good memories; and is close enough to the original experience for me.
The purists won't love it - their are some cons: spinner isn't great, monitor rotation is not right for a few of the games, and the cab is pretty short (riser helps with this).
I'm hoping they do squeeze more games into the future models - having a hard time purchasing one cab with 2-4 games, but the one I bought had enough games for me to warrant buying it.
Also - this is the only way I'll ever be able to afford owning Quantum - broken boardsets alone go for far more than this. =-0
I did just notice that BJs is also going to have the Atari 12 game model for $350 come Black Friday.