I can't speak for the Behringer Tube Overdrive, but I had the Bass Chorus and it sounded a lot like a Boss Chorus. The Bass Synth sounds like the Boss SYB-3. The rumor is they're all cheap clones of Boss pedals, so I can't imagine it being much better/worse than a Boss OBD-3.
And since the ODB-3 is way over-priced (I usually love Boss, but seriously, an hundred bucks?), I would get a pretty good deal, IMO. If I'm too scared to break it, rehousing and that's it. Hum... Sounds like a plan.
