We were given a Senseo machine for Christmas. Initially it was disappointing – the coffee was okay, better than instant, but no reason to turn away from the stove top espresso machine.
We now use coffee from http://www.thecoffeepod.co.uk and it’s transformed it. Sure, probably not quite as good as a decent grinder and machine I’m sure, but really nice, strong, fresh coffee with almost zero hassle. It works out about 13p a cup; I can’t decide if that’s good or expensive? Either way, it’s now getting heavy use rather than sitting ignored. Cheap to buy too.