I have bought a LOT of shirts from my Redbubble collection over the last eight years!
I find them incredibly comfortable and can be worn both in warm and cold weather. Only once I have made a mistake in size, but it was worth it to find out what the T-shirt would look like!
EDIT 9:48 PM 24/07/2016 - Here is a short video I created a few years back but only recently uploaded to Youtube. I undress myself of about 12 of my favorite Redbubble tshirts