Hi.
If it meets Your needs is entirely up to your demands IMHO.
Personally I wouldn't use anything less than 15"+1" actives (at least not anymore

)from these "budget" manufacturers, the SPL levels just don't cut it.
We have two of the similar (same?) T-Box or something like that, actives and we have gigged with them too in the smaller pubs. While adequate for vocals, I would hesitate to put anything else there. The ability to double as monitors adds their value considerably.
Keys might cut it if the keyboardist is light with the left arm and/or doesn't use low synth too much.
Bass won't cut it unless the drummer is using straws and wooly sock over the kick hammer

. The advertized power is music power I believe so divide that by three...
The 15" version might be better, but I doubt by much.
I do remember that You said that the used market for bass gear is almost nonexistant over there, but a dedicated bass amp of some sort is a must if the SPL rises to anything over the conversation level.
Regards
Sam