I think it's all a matter of personal taste and experience. When bbq'ing a steak, I like a lot of mesquite smoke to waft up because of the short cooking time. Smaller chips will produce more smoke than chunks, but burn up quickly, so I add more during grilling.
Has anyone heard of Woodbridge Grill? I came across it while shopping at a drug store. They have an online site to buy them.
The tins are nicely painted and the little smoker box you use is seated at the top of the tin. Just a very cool idea, one I wish I'd thought of.
Woodbridge Grill Get Smokin'
EDIT: It seems the link at the site to buy isn't working. I'm emailing the company to see if they are still in business.
I will post back here when/if I get a reply from the maker.