Got both the 550 and 1150. Both worked great! First product I've bought that actually worked. Arrived quickly! The worms seemed to stiffen up quicker than the bears.
Shipping note - If you live in an area where it is hot, they may melt in the mailbox. My first order almost melted in the summer heat but I caught it just in time. However, I have seen other reviews where they did melt.