My mom wants one of these Keurig Coffee Brewers and I was thinking about getting her one for Mother's Day, but I have a few questions. She has one of those 'pod' coffee makers (I forget the brand) where you put in one of those large tea bag type of coffee things and it brews one cup at a time, but my mom doesn't like it because she doesn't use it every day (she only really makes coffee on the weekends) and it states that if you don't use it for 3 days, you have to really clean out the machine. If forget the actual term they used for it, but it sounded similar to 'seasoning' a cast iron pot when you're not using it. She doesn't like this idea and would prefer a maker that didn't require a ton of maintenance. Has anyone had experience with the Keurig maker? If so, is it a bitch to clean? If my mom uses it only on the weekends, will she have to do a lot of 'keep up' work with this maker? Also, our local Linens and Things had the "Ultra B50" model (for $150) but I see there is a cheaper "Elite B40" model. It looks like the main difference is that this cheaper model only does 7.25 ounce (where the B50 does 7.25 as well as 5.25) and the B50 also has a programmable LCD. I would assume that the LCD is so you can program the coffee to brew at a particular time? Since my mom doesn't use that sort of thing, I was thinking about the B40, but limiting her to only 7.25 ounce cups, hmmmm? I'm not a big coffee drinker so I don't know if that's good or bad? Also, what does the 2 sizes mean for the K-Cups? Would you need two sizes or does one K-Cup work for the 5.25 and the 7.25?? Any help would be appreciated. Thanks. p.s. I do see (on their site) that they talk about 'descaling' which should be done every 6 months.