I'm curious to try The Band because it can be installed/uninstalled so easily, but very skeptical because its hard to find many people using it professionally or enough high-quality sound clips online. Almost everything I've tried can sound decent enough at a low to medium volume. My concern is how much usable volume can you get before feedback? More or less than the Realist, Realist Lifeline, RevSolo, or KNA DB-1, anything you've used? The Realists are solid reliable but I hate the semi-permanence of their install. The wingslot PUs are always a bit finicky with placement and pressure. Playing local venues, more often than not, I'm crammed up against a wall right in front of my speaker and expected to fill the room. I do okay with the pickups mentioned, but it takes a lot more tools and dialing in than I'd like. If The Band was comparable, I would be happy enough. It just can't be worse.
I've never had much trouble with feedback, but I also use a notch filter whenever I get above anything but the lowest volume levels. One thing I have noticed about the Band is that it very much amplifies the natural resonances of the instrument. That can be both a good and a bad thing. I think it is part of the pickup having a more natural sound than a bridge wing pickup. on the other hand, my bass is particularly resonant between about 80 and 100 Hertz, and while i don't have too many issues with feedback, I definitely find that I need to pull those frequencies out with EQ.
I agree with John that bridge wing pickups are probably more feedback resisted than The Band, but would add that The Band is WAY more feedback resistant than a microphone.