The mount works well enough, I don't have anything very bad to say about it. I don't find it as stable, robust nor well made as my AM5 which is a natural competitor (spec wise, not price). But it does well. Th only real gripe I have with it is that its made up of cheap, low quality components on the inside. There have been a lot of broken boards and bad wiring from what I've seen in the community (both CN and FB). I had the same experiences after six months of use. My mount suddenly stopped working and I had to replace the board and the cables.
As QC isn't the best you may get a copy that develops a fault quicker or slower, but you have to account for this to happen at some point and be willing/comfortable fixing it yourself. Warranties are also not something you can expect. I had to buy all the replacement parts which ended up costing about 1/4 of the mount (including pier extension - before tax). Which is quite expensive, and if you have to do this once or twice you may have been better off getting a better made mount. After six-eight months now I also see surface rust building up on bolts/screws, the CW rod etc. So there is also a lack of anodizing.
I'm not trying to slate it, because I have it and I do love it. It's just important that people understand that they are buying lower quality components. It's cheap, and there is a reason for it. Other than that, great piece of kit mostly.
I've mostly used it with my C8EHD which is a bit over the edge for what the mount can handle FL wise IMO. Here are
my images so far. It's been going well mostly, but it will not guide at 0.5 stable. It will for periods of time (pointing right up is not affecting this number too much) but mostly it will hang around 0.5 to above 1. Which is no good for long FL imaging, but more than good enough for medium sized telescopes.
As for PE I haven't measured it but I have noticed that I absolutely need to guide mine with very fast exposures. I usually do 0.5 or 1s max, but anything higher and I start noticing periodic error building up and eventually ruining subs because it doesn't get corrected fast enough.
To figure out your own ideal sampling 
