until you have a problem with an item. Then you are literally sending email's to a brick wall. That's my experience with them anyway (Had a mag turn up with a blocked open valve) they asked for photos, then video, then I was ignored until I started the process again. Same thing, photos, videos... nothing.
After the third time I gave up, replaced the valve and moved on with my life! (Hopefully I'm just a one off, but I doubt it)