I went there for the Chicago Classic last year. It is a very nice poker room. I would probably go more often except I don't like driving and getting a room if I want to play a lot of poker, might as well fly to Vegas
Now for the 2 downsides I experienced.
1. It is extremely smokey, yes the poker room itself is non smoking but their air filtering sucks. I had to leave after a few hours because of it.
2. I had to request a table change, my first ever (I've been playing live poker most of my adult life if you want to take that into context). There was an obnoxious regular that insulted everyone at the table and I had had enough. Tried to joke with the guy at first to lighten the mood but he just kept on attacking any and everyone and would not be sidetracked. I finally got to leave the table and they booted him out soon after because he went after the dealer. It was ridiculous. Hopefully if you go you won't get this idiot at your table.