I like to do them online. I can collect the patterns and do them on my time. The local LQS has one that I'm doing, well I'm actually teaching as I'm doing. When I get the pattern at the end of the month I make the block out of my own stash first and then teach it in the following weeks to a couple of ladies that are new to quilting. What I'm finding is that the patterns are geared toward buying more rulers and supplies from the store. Being a seasoned quilter I refuse to use the shops rulers if I can do a different way. They even have changed the patterns to make them more complicated in order to sell a ruler. I teach the block without the rulers. One of the gals in my class bought the ruler, I told her if she wanted to use it fine but I refuse to do the extra piecing. Its the first and the last LQS BOM for me. However I will say that it has given the gals that I'm teaching alot of experience in different techniques.
Currently I'm working on several Internet BOM's and love them. Theres no sales pitch and no pressure to finish. Two of them ask that you buy the last block to finish the quilt. I don't have a problem with that if its a good design and it is.