I've had this amp for a few months now and I'm loving it. So authentically 'valve-like', even sounding like it has a valve power stage (yet [i]so[/i] light).
I never use a tuner send but my only negative comment I have about it is that it doesn't have a standby/mute switch, so when DI'd through the desk, I have to mute the desk's channel before I shut the down the bass amp's power. This hasn't spoiled using the amp though, and a satisfying tone is almost instant with all of my basses. Good luck with the sale!