I had one of the 5 strings. Fun toy. Played far better than it had a right to. It's a pretty cool thing when used in conjunction with the BassPODXT Live.
For me at the end of the day, the basses all sound like what they are: attempts at digital reproductions of other basses. Some of the models I wasn't familiar enough with to know if they were any good or not.
I didn't keep it all that long.
Carvin 149/5 String 90/Ergo 33/L.O.G. 266/Chi-Love 3/California Bassists 65