I had a Black & Decker blender for years, glass carafe, ice crush feature, blended great. Disassembled for cleaning, which I thought was great too until I started using it for smoothies and realized it had to be taken apart and cleaned every time... Washing it from the inside didn't get the gunk that got around the gasket at the bottom of. Problem with disassembling it frequently was that it started to leak. For the first few years of ownership I used it very seldom, when I started using it almost daily it lasted about three months before it was almost impossible to put it back together without leaks. I have this Kitchenaid one now:
Kitchenaid blender. It doesn't come apart to clean, but it very cleanable - can run in the dishwasher. I use a baby bottle washing sponge to wash mine daily. The bottom is flat and there are no grooves or indentations where gunk can build up. I have the polycarbonate carafe and have had no problem. We've had it for about six months now and it gets used sometimes three times per day as I always drink a smoothie for breakfast and often for snack & DH makes smoothies occasionally as well. Love it. I did get it cheaper than the price you see on Amazon, found it on sale. It comes in other colors too, and they are sometimes on better sales if you don't care about color.
I had a magic bullet for smoothies originally and burned it up after six weeks of daily use. Loved the functionality of it, though...