Well, the feel and function are great. Neck profile, satin finish, body contour, control simplicity, bridge integrity, etc. all top-notch. Not to mention the aesthetic, which you obviously dig. 'Nuff said.
Where it really shines is in the wide range of KILLER passive tones. It gets this beefy-yet-detailed P-Bass tone that I haven't had since I owned a vintage Fender with an early EMG installed. LOVE that. The bridge PU soloed is more like a muscular passive Jazz bridge tone than an active-EQ 'Ray, so put that right out of your head if you were thinking along those lines. But it is killer as well, and there is a wide range of subtle variants available between the two. One in particular that I am loving: tone rolled off about 25%, pan rolled *just* ahead of center, favoring the Split Brick, and playing finger-style between the two pickups. Dee-lish. BTW, as with all basses, your right hand position makes a difference in tone, but with the Merc it is REALLY noticeable. And useable.
You are going to love it. Guaranteed.