Ceremony Music-M.A.S. music

Hello all,
We are seriously considering hiring musicians for the ceremony. Has anyone ever used MAS music? Their prices are very reasonable but I haven't seen reviews on them. We want violins or a string trio but like the sound of the piano on some internet samples. What have you guys used and also, did anyone ever have the musicians play contemporary music? If so, how did that work out?
Thanks a million for any input.