I own one, as do many other hide members. There were some early turret issues and some have complained about poor QC, I shot with a friend this weekend who's own 8 ZP5's and he says they've all been stellar performers. You can read hk dave's review here:
Tangent Theta TT525P 5-25x56mm vs Minox ZP5 TAC 5-25x56mm vs Nightforce ATACR 7-35x56mm F1 vs Vortex Razor HD Gen II 4.5-27x56mm vs Schmidt Bender PMII 5-26x56mm L/P DT This review and comparison has been a long time coming. It’s essentially the comparison I’ve always wished someone did in an...
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And you can read my review here:
http://www.snipershide.com/shooting...ht-tactical-scope-evaluation-part-ii.6255263/
I have used a lot of scopes over the years, some were stinkers I wouldn't pay half the price for, others performed to their price point and some punched above their weight class with regard to price/optical performance. The ZP5 5-25x56 reigns as the best scope I've ever looked through, but the ZCO will give it a run for its money and of course Tangent Theta if you can foot the bill.
ILya just did a video review of high end scopes here -
http://opticsthoughts.com/?p=2567
You should really pick the reticle that you think you'll like the most between these scopes. I have a Kahles K318i with SKMR3 and the ZP5 with MR4, I like the MR4 better, but I think I like the thickness of the ZCO MPCT most of all, the problem is I do not like the solid stadia lines in the Christmas tree of the SKMR/MPCT reticles and much prefer the dots incorporated by the MR4, I like the Mil-C and Mil-XT reticles in design but have yet to see one so can't help you with real world experience. Turrets are more personal preference and I've never had an issue with the ZP5 turrets. Overall, I think the ZP5 represents the best value in the $3k scope class and optically challenges the best of the best. In ILya's review above I think he ranks the scopes per his preference and he says TT > ZCO > ZP5 > Schmidt and I have no issue with his evaluation, I have yet to experience a ZC527 compared to the ZP5 but based on my brief experience with a ZC420 I have a feeling the ZC527 is nothing short of amazing. It's a few hundred dollars more than the others, but the ZCO ZC527 should be on your radar if you like the reticles.
I would also highly recommend you call CS Tactical above and talk with Richard or Mike if he's available, these guys know their stuff and they will more than likely beat any price you've been quoted, they are great to work with.