I'd reccomend the full boar mark bell slingshot as even his others don't have the tapered arms and it's impossible to get any other one that's "suppose to fit" past your bicep peak. Ya my shitty knee wraps added about 20 pounds but now that I have some top notch ones I'm thinking I can overload with around 30 pounds for a double.
Slingshot is a great purchase when your bench starts to fall behind a bit as it builds your tris up and it's so easy to hold perfect form with it.
I like the idea of reverse bands more then regular as they don't pull you off balance as much and you can feel what the weight actually is at the top
Not every lift responds well to reverse bands. Reverse band Dead lift for example has been noted quite a few times as not transferring over to your dead lift except in a few cases. Also the speed benefits won't be seen like if you do band the regular way.
When I've used bands I've always looked forward to that off balance force. It made me work harder to stay in position. That helped during me at my meet as my coach said I didn't have as much form breakdown he was expecting on 3rd attempts.