I have not, I picked up a used one from LensRentals back in the day, and it does what I need (but isn't even HD). The trick is to balance the features and price. There are more expensive ones, and they'll have better color, but will it be enough? Is HD enough image quality to convey what you're looking for?
Depending on your client & price point, honestly, I'd consider shooting tethered with a Surface Pro on your hip. That way you get a higher dpi screen, with greater than HD resolution, plus the ability to zoom and stuff.
To take it to the next level, CaptureOne Pro is your friend, especially when you can setup an adhoc wifi network and hand your client an iPad with Capture Pilot to follow along on the shoot, so you can immediately adjust a scene or shot without the constant back and forth with your gear. CamRanger or EyeFi might also work, but that's a client interaction & workflow type decision.