I played my first gig with a Fender Mustang Bass last night at a small club and restaurant. I used the Mustang along with a Carvin BX500 head and an Eden EX12 Cabinet. That set up worked great. The Mustang performed much better than expected. Actually I didn't really know what to expect. I was also pleasantly surprised with the small Eden Cab. There were about 50 to 60 people in the club and the little rig sounded great.
Glad it worked so well for you. I think Mustangs sound really good in the mix. Here's a pic of me gigging with mine.