I've had my Horizon SS for a couple of weeks now, and have had her out to a couple of gigs, so I think it's high time I post my thoughts.
First and foremost, the neck was definitely chunkier than I was expecting. I'm a little dude, so it was a bit off-putting at first. However, once I threw a new set of strings on there and played around a bit, my hands instantly got used to it - and fell in love. It's also got a great weight and is very well balanced.
I don't know what kind of magic dust or metal went into those pickups, but man are they something special. I'm blown away by actually having a usable bridge pickup in a 3-pickup guitar, and I even found myself playing in position 3 for a lot of the night - which I don't think I've ever done.
I brought both the SS and my Suhr Ian Thornley model out to band practice, and my bass player immediately said that the Suhr could take a back seat to the SS from now on. This band plays covers from the 60s through today, and the SS was more than capable of holding its own for everything we play.
Very happy with this pickup to say the least. Sadly, not so happy with my locking strap, which busted mid-set and resulted in a fine-looking ding near the back strap pin. Ah well, guitars are meant to be played and there's nothing wrong with a little battle-damage!