I owned the TDAi2200 years ago and it was a very good piece of kit. No matter the room or associated equipment the sound was always improved when activating the RC versus running it in bypass mode.
The unit sounded good as a straightforward integrated amp, and became very good with the Room Perfect feature engaged. Unlike most room correction devices there's very little learning curve involved, which is nice for an older dude with a learning disability such as myself.
Expect the soundstage to open up in all directions and for image focus to improve. Expect better integration of lower frequencies, though this will depend on how you configure your system. If you have dual stereo subs and satellites the Lyngdorf unit is for you.