According to the Amazon data base, I purchased the Magic Bullet in March. It is hard to believe that I've been using this blender at least twice every day since. I have used it primarily as a "frozen" drink maker--some would call them smoothies, I call them meal replacement drinks. I have also ground coffee beans to an espresso grind; made pesto, salad dressing, and use it to mix the wet ingredients for my seitan.
What I have learned: the heavier ingredients need to go into the cup first and then the lighter ingredients, whatever they are. When making pesto, this means that the nuts go in first, followed by the cheese (especially if you are using a chunk of cheese as opposed to shredded) and then the basil. If you are using olive oil, it should actually go in last. The reason for the importance of the order is that the blade, while it is put on top of the cup, is actually the bottom of the blender. Putting the heavier ingredients into the cup first help insure smoother blending action. The only time that the heaviest item should not go in first is when it is sticky: nut butter, molasses, etc.
When I make pesto, I leave it in the cup and use the "storage" lid. I have found that it keeps very nicely for about a week.
What I do not recommend: While grinding coffee beans was successful, I was a bit concerned about the motor burning up. It may be because I was grinding the beans to an espresso grind rather than a drip--as they show on the infomercial. I also do not recommend grinding large quantities of cheese. Truthfully, it is questionable as to whether it is faster than using a box grater. I have also tried to grind medications and calcium tablets. It takes a very long time and the pills never really got powder smooth. They also stay "stuck" to the bottom of the cup when blending into a drink.
Advice: remove the gasket for cleaning. When using berries, the seeds can slip under the gasket and cause a mess. Also, when using the Magic Bullet for mixing anything with oil or fats, I recommend washing it in the dishwasher (top shelf). I had no luck cleaning the "grease" out; however when blending just about anything else, it is very easy to clean with just water and a drop of dish soap.
Yes, I will buy another if/when this one dies of over use.
Asides: for some reason, the Amazon data base has me having purchased the Bullet through them through a 3rd party vendor. My purchase was not through the 3rd party vendor--why, when Ammy ships for free? My original review can be found at:
Magic Bullet Express 17-Piece High-Speed Blender Mixing System