Been diving a Fusion Bullet with Air-Core since I started diving dry a handful of years ago. While it does take a minute or so longer to get into my suit than my dive partners with other brand tri-laminate suits, I have not had any problems putting my suit on or taking it off. I use a large military flight overnight bag to transport my suit, I often stand in the bag and remove my suit directly into the bag without issue. I have the fusion boots semi-permanently attached to the suit which helps make removal of the suit quick and easy and protects the sock-feet of the suit.
The gore-tex like material of the Air-Core is surprisingly comfortable from a suppleness and breathability standpoint outside of the water. In the water, the outer skin keeps the core of the suit streamlined to my body and helps me control the movement of air throughout the suit. I can slowly roll the air bubble around whereas others describe the movement of the air in their suit as shooting across their shoulders or down their legs.
The fusion boots (first generation) are not very supportive but I added hiking boot insoles inside the feet/socks of the suit to make them more comfortable. They are however low enough profile that I did not need to invest in new fins when I switched from diving wet to diving dry, this remains a nice feature as I use a wetsuit, semi-dry, or my drysuit depending on the weather and water temp/thermocline situation...I use the same fins with all three.
While I don't believe the Fusion is the greatest suit ever invented, I don't believe there is a "greatest suit ever invented", there are pros and cons to every make and model. The major thing the Fusion has going for it is that it is adaptable to changes in body morphology...after buying my Fusion, I dropped 50lbs...had I purchased another type of suit it most likely would have necessitated me to purchase a new suit in response to the changes in my body. Then after a year of Covid-19 related lockdown and associated inactivity I gained some weight back, my Fusion suit has accommodated my body changes without zero issues.
Older drycore suits, which is what was available when this discussion thread was first started, have a very different feel than the aircore version of the suits. The drycore version was not breathable, the material was very thin, and felt/sounded like a trashbag. Lack of breathability meant sweat condensation inside the suit while out of the water, particularly on warm days. The biggest advantage to the drycore models was the material, to my knowledge was easily repairable/patchable, but a lot of folks did not like the way the material felt and had difficulty donning/doffing their suits.
The only reservations I would have purchasing another Fusion suit are:
1. The cost of a Fusion suit in the US more expensive than in Europe...you can just about buy a cheap flight to Europe, purchase a suit and fly home for less than it would cost to purchase in the US.
2. Current Fusions come with a plastic zipper instead of a brass zipper. For some this a non-issue but currently prefer brass drysuit zippers.
-Z