Overall it seemed to be fairly decent quality, however I did find the dpad on mine to be touchy. IE it would register clicks in directions I wasn't trying to do, such as pressing up would activate left or right at times etc. Also the Dpad in general may not be in a great place for some folks being more centered on the controller.
The analogue stick seemed fine, overly sensitive but unavoidable with current modern offerings.
Honestly if it hasn't been for the dpad quirkiness and the issue with it being a bit to small for my hands it would of been a keeper.
A decent alternative is one of the MODESLAB pads or other names it comes under (generic carried by multiple companies etc). It's a tad bigger (more comfortable for me anyway), overall analogue stick and buttons seem to be similar overall, dpad is in a better placement. If your willing to spend more I'd recommend the wireless version of the retro-bit tribute, but for wired the cheaper pads work as well even if not quite as high quality.