I have an SX SJB62-5 fretless bass. I don't think they're even available from Rondo anymore, but I got it back in 2006 I believe. Over the years I've made some small adjustments. I immediately replaced the bridge (with a Schaller bridge with rollers, as the stock bridge had almost no mass.) Recently I put in a set of EMG J-X pickups, and the bass sounds far better to my ears now (even with 3 year old strings.) Right before I start recording my bands EP I'm going to change the strings again and I'll throw up a comparison clip.
But they're worth it. I spent $150 on it and I think it came 2 days later. I remember sending Kurt (the owner) an email about the fingerboard protection (as its rosewood) and an hour or two later I had gotten a reply.
So I mean, for ~$400 you have a bass that's comparable to, or imo better than, an MIM Fender. The higher quality Brice basses will definitely be better than an MIM Fender and will probably rival MIJ/MIA ones tbh.