One downside of the C65 is that it isn’t self-cleaning. If you don’t mind taking it apart and rinsing everything out manually, then that shouldn’t be an issue. However, as James mentioned, sometimes the bean holder will think that it’s empty when there are still grounds inside. Overall, it is a minor inconvenience, but it can be frustrating when you’re running late in the morning, and you get a smaller cup as a result.
3) This machine is crazy smart. It knows exactly when to clean itself, or tells you when to start the cleaning cycle. To clean it, all you do is insert a tablet in the coffee powder drawer and it does its thing. It knows when it needs water, when the filter needs to be changed, etc. In fact, since we have a water filter built into our refrigerator, we just use that filtered water in the coffee machine and therefore we don't need to use the expensive water filters. Bottom line, if you just pay attention and clean the machine on a regular basis when it tells you to, this is a no-brainer machine.