I've owned 4 Bongos (but am currently down to one), so I know them quite well.
They're unmistakably Music Man basses. They have that extremely distinctive upper-mid bite that MMs are known for, and solid, wide bottom end you can stand on. The pickups and preamp are extremely powerful, with a ton of headroom and almost every kind of tone you'd ever want is in there somewhere, between the two pickups and the 4-band EQ.
Ergonomically, they're a little weird. They don't sit all that well on the knee, but they're well balanced, reasonable in terms of weight, and have slim, comfortable necks.
Overall, they're great basses. And that's a good price. I say go for it, you aren't likely to be disappointed.