The problem is buying the pods!
I have 2 Nespresso machines and think they are great. Admittedly, you can have a better coffee using beans and a grinder, but I have 3 kids and it's me who gets them ready EVERY morning for nursery/school. I cannot be doing with thinking about messing about, even if it is a nice process, in the mornings and that's why pods are good for me. Also, buying pods over the web is NOT a problem. I buy most things over the web and it's just a case of knowing what you have left a few days before you order again. When I get down to the last box (of 10 pods), I order again! Simples!
1000's of things are ordered over the web. Nespresso pods are no different. They even throw in free postage if you order more than a few. Can't think how many, but it might be 15 boxes (roughly £3 a box).