What's the best sticker company out there?

Personally, I love MakeStickers. I've always had really good experiences with them. Their stickers are high-quality, super affordable, and they've done a great job in the past of transferring super detailed artwork I've submitted to them onto relatively small stickers.

But, having said that, I'm curious about other people's experiences with other companies.

I'd like to cover all the bases in this discussion - quality, cost, shipping speed, ordering experience...

What are the pros and cons of some of the other companies out there?

I know there's Sticker Mule, Sticker App, Vista Print, and a million others...

Thoughts?