I have a bike with a Shimano Nexus 8.

I like it - it takes some getting used to since it shifts best when the pedals aren't moving. Just yesterday I made the chain jump the cog when sprinting through a left turn in a busy intersection because I tried to shift it like a derailleur. Getting the chain back on is a bit more involved than with a derailleur system - I had to flip the bike over and undo the axle bolts to loosen the chain enough to get it back on.

I'd also recommend getting used to getting the rear wheel off. It's not a big deal once you know how, but it's some extra steps you don't want to be doing for the first time in the rain.

Sometimes the dustcap rubs on the hub, it's very noticeable when the bike is on the repair stand, not as noticeable when I'm in the saddle. At some point I'll probably take it into a shop and see if it can be fixed. If I get around to it.