Full disclosure: I own 3 Jones boards, 161 carbon flagship, 154 ultra mind expander, and 154 storm chaser.
I got the ultra to replace my carbon flagship as a daily resort board. I've ridden it for around 10 days now in every type of condition possible: pow, ice, uneven terrain, groomers, on/off piste, even on a sand dune (no joke).
What impressed me most is how turny and slashy this board is, you can rail a hard carve and leave a trench at any speed without washing out. The turn initiation is insanely fast edge to edge, and gives me a very "in control" feel.
A few comparisons:
Carbon Flagship: With the CF you have to, at minimum, ride above 30mph to get a solid engagement from the board, it turns quickly but only when you're going above 30mph, and it really really like to straightline. With the CF, you're just a bystander along for the pants soiling ride.. before you know it, you're bombing down at 60mph and praying you don't wake up next to hospital lights. Don't get me wrong, the CF has its place and is bar-none the best at freeriding and stability at speed, but for all its accolades, I wanted something more daily-able that's also fun at slower speed.
In comes the UME, which combines the best of CF while maintaining a fun personality (CF being a serious personality). It's super stable at speed too, I didn't notice any chatter around 50mph - which is the fastest I've gone in the UME, and because the turn initiation is so quick, it makes tree riding and railing hard carve on groomers a blast! In powder, its no less a board than any other pow board, the short tail with big nose makes riding pow pretty effortless. Riding in pow, I actually to lean forward on the ultra to get better speed and control, but the fact that I can lean forward shows how well the huge nose and spoon shape floats.
Storm Chaser: The storm chaser is a powder machine, but I mistakenly rode it on uneven terrain in the spring time, the rocker profile bucked me around so hard that I was like never again in bumpy conditions. That set the stage for why I went with the UME over the regular ME. I ride in Tahoe (Squaw Valley) where we get all types of conditions - when its good, it's knee deep powder for days but those are few and far in between for me (because the highway gets shut down before I can get up there), so the majority of my riding is on uneven terrain, groomer hard pack, and the occasional pow. This is where the camber profile really shines and gives the board the stability I'm looking for in a daily. To date, I haven't washed out or got bucked around like I'm riding a snow horse and I've charged some hard lines with this (double black at mammoth).
Look, I'm not saying the majority of people who get the normal vs the ultra don't enjoy it, I'm just saying don't overlook the ultra because in my opinion, it's a much better all rounder and if you're like me, looking for an incredibly fun daily to tear up the whole mountain (park aside) this board would put a huge smile on your face.