I've been doing 4-player Tetris matches online for the last 3 hours. I'm going to dream of falling blocks tonight.
The game much better looking than Tetris DS, that's for certain. Controls haven't changed much, if at all. No touch controls, just d-pad and buttons. I like the addition of the "hold piece" feature. The smoke bombs and other distractions are infuriatingly fun. The double-wide Tetris matrix is freakin' massive...I played it solo for a few minutes and could feel a stress headache coming on! I like that you can strip out all of the new bells and whistles and just play some classic, crusty 'ole Tetris, if you want to, as well.
I didn't have any problems finding online competitors tonight, either...longest I had to wait for a 2-player match was 15 seconds (and you can play Tetris while you wait). Getting 2 additional competitors in the game took another 15-20 seconds.
I haven't really dug into all of the options so I can't comment on the rest of the new features yet. I've really only noticed one music track, thusfar: a gently remixed version of the classic Tetris theme. The achievements give you a nice checklist of "cool shit to do with Tetris".
I like it a lot.
I'm fairly certain the BOGO deal at TRU ends at closing on Saturday, Metaly.