Online despite being barebones is holding up great and I'm having a lot of fun registering best friends, messaging online people in-game (it's fun in a tomagatchy-esque 90s-era texting simulation way), opening my gate and getting people over or flying to people's islands and seeing just how diverse in playstyles and layouts everyone's been doing things.
Last night spent half an hour in my niece's town getting wowed at her feats, until I realized her time traveling friends helped her... Then she came over to my island for an hour while I hunted stringfish.
This morning I log on and Dickie wants to know if he can sell his fruit on Ohana, and of course I say yes. We meet up and he gives me the perfect item to further develop my hot spring area.
A guy on another forum who I've known for years and is a GC diehard, though he played NL, popped over to check my shop out and get the Ohana Isle tour. Had a lot of fun showing him things and blathering on about my plans for everything.

Where as about 30% of online New Leaf 3DS sessions for me would die and soft crash, I haven't had any issues in normal play with NH's online. Hopefully an update adds multiplater tours, because otherwise it's a very fun, smooth time.