I put this for a while in one of my Gibsons.
They fit perfectly in the humbucker routed hole, without any modification needed.
They sound very nice, charming highs and top notch clarity, much more than with any of my humbuckers.
However, they aren't a full P90 either (I did compare with my Juniors).
If you're after an in-between sound go for it, it's a very nice pickup, very well built.
Recommended!!!