Not on a tablet but I have had to send back one of my asus laptops (couple dead pixels on the screen, and the screen closed sensor or whatever its called was bad), shipped it out. two weeks later came back fine, no damage to the device, repairs were well done and they fixed everything i knew about (come to find out two weeks later it needs to go back for a usb 3.0 issue) but their initial repairs were all well done.
EDIT:
I hear a number of people complaining about how dumb their customer service was... and its very very possible I just got lucky but the guy i talked to may very well have been an idiot but he was nice and courteous, on par or better than any other manufactures customer service I've had to deal with in the last 5 years.