I received a Black and Decker ProBlend 450 for Christmas last year. First, after very little use, the collar at the bottom cracked, which Black and Decker cheerfully replaced. Now the whole thing has had a meltdown; it is spitting out melted gray plastic and the blade is siezed. They are offering (again cheerfully) to send me another new unit for $5 shipping. After seeing the reviews on Amazon, I am thinking it might be better to just save the five bucks and put it towards the purchase of a Black and Decker BL600B. I have no particular preference for that brand, just saw a lot of good customer reviews about the BL600. Does anyone have one of these? Would you recommend it? If not, any other suggestions? We use a blender infrequently and generally for pureeing things.