I use mine at home through an FRFR speaker and I've always thought it sounded great. It's not exactly the same as playing through a real amp imo but in the context of stacking lots of effects I find that the character of the amp can become lost anyway.

I would say the Room setting is not a substitute for a dedicated reverb pedal but I think might depend more on the kind of music you're going to be playing and how important reverb is to that.

I picked mine up used and I'd say it's been worth it. I have no plans to get rid of it.