Just got an X52 after my x45 lost a hat (thank you, best buy guarantee!).
Maybe its the contrast, but I LOVE the 52. With the 45 the spring was stiff and would kick in just a few degrees off center...so with fine movements I'd have nothing, nothing, KICK to the side. The 52 is silky smooth. I've noticed no problems with the throw at all.
My hit% and KPD have jumped significantly, and I really believe the 45 was holding me back.
I expect though that it will start to fade in 8-12 months, and my next purchase will be a CH.