nothing major.
we have pretty hard water here, it was killing one of the generic charcoal pitcher filters within a month. the filters in this one haven't had any problems by the time they are scheduled to be replaced.
a couple possibly annoying things:
- the reservoir is on the back, so it's not great against a wall under cabinets. they have a little cart you can buy explicitly to help with that, but it felt silly so I just put it somewhere else
- you can't just top up the reservoir, you have to wait for it to finish, dump it out, then refill. annoying when there's just half a tank left. I end up just trying to use an entire pitcher by dumping it into kettle/espresso machine whenever I use any water so reservoir is either entirely full or empty. afaik true of any of them that aren't plumbed in.
- don't love the fact that I'm locked in to the manufacturers' filters. there don't seem to be any third party ones available if they ever discontinue them