Hi Sam,
I've owned my Karma for a little over a week now, and I've been more than happy with it. I also owned a first-generation Karma before the recall (had it shipped from the US to AU, then returned) and it has improved quite substantially since then. The main points I've found are:
- The horizon tilt issue seem to have disappeared. I posted a YouTube video with my first-generation grip attached to my kids running pram, and found the tilt to be horrible. So far my new Karma hasn't had any issues, and I'll give the pram another test run this weekend. It certainly looks promising.
- I flew it last weekend on a family farm, and had no issues out to approximately 900 metres. At that distance I lost visual sight of it and returned home. In Australia at least, you must keep it with visual line-of-sight (VLOS), so I think it's safe to say that range isn't an issue because you hit legal limits before you hit technical ones. Some people have commented that they lose connection with the drone at short distances, but I suspect that's due to environmental factors (terrain, interference, etc.) more than a technical ones. YMMV.
- It's so easy to fly. I can't compare it to other drones, but I can land it on any point (manually, of course) at very short notice.
- Spare batteries aren't yet available in Australia, as far as I can tell. I wish they were - I'd buy one.
Whatever you choose to buy, make sure you understand CASA rules around flying a drone (UAS) in Australia, and download their app that publishes the no-fly zones so you don't end up in trouble. Have fun!