I bought this pickup to upgrade my friend's s-s-s stratocaster. Luckily, the guitar was already routed for h-s-h so no drilling, just put a new pickguard, a bit of soldering (500k volume and tone pots) and it's done.
The sound is quite mid to high mid heavy and cuts through nicely, maybe lacking a bit of bottom end for my tastes. Oh yes, the stock single coils now sound a bit wimpy compared to the humbucker; I will spend some time adjusting pickup heights in order to even out the volumes. Overall, a solid upgrade.