Build quality is also much higher, and the attached wrist rests really help after standalone ones floating all over my desk for years.
Some folks make do with 4 thumb keys.
There are some extra keys, but some of them seem hard to use well (the big red triangle keys at the top of the thumb clusters) and other things that sound great in practice, like "hold" = modifier but "tap" = insert some character, in practice have turned out to have more annoying rough edges than I had hoped.
It's very well-made though, the configurator works good, etc. Seems like a high-quality gadget, but I wish I thought a bit more about what I would do for arrow keys, special characters, modifiers, etc.
I found the Kinesis thumb clusters a lot more usable when I used to have one, but I really wanted to try a split keyboard this time.
I had mine for 6 to 9 months and it just didn't feel like it was for me. I didn't have all the keys a normal keyboard had, I couldn't remember how I mapped the keys, etc. So I went back to my ergonomic Microsoft keyboard. It only took a couple of days to realize how much better the Ergodox is. I remapped all my keys and started using it with a new found passion. There are still some tradeoffs, but every once in a while I 'feel' a keypress and I think about how cool my keyboard is.
It is worth the journey. If nothing else to realize that it isn't for you. If you spend a reasonable amount of time in front of a computer, it behooves yourself to make the tools as fine as possible.
ZSA does 30 day returns: https://ergodox-ez.com/pages/shipping-returns
It's only the tip of the iceberg w/r/t the number of keyboards out there but they're the most polished products and they cover a lot of your more exotic bases (split, key wells, thumb clusters, etc.)
I think the problem with a showroom is that you really need to invest at least a week or two to get used to the split keyboard. But for me, it was totally worth it.
I wouldn't buy this board, it's a wannabe kinesis advantange but flat. Makes the reach too hard imo.