I have two FT1 first stage and two XT2 second stage regulators.
The XT2’s pre-dive switch works fine.
The WOB knobs (formally “external adjustment knob”) on the XT2 regs work great and produce noticeably more difference (positive) in the WOB than my Zeagle second stage reg (retired).
I’m on and off my primary a lot as I like to orally inflate as a rule of thumb. For my twinset, that’s about three back and forths between my reg and the inflator. I’m also on and off the secondary (necklace) a lot to keep my mind mapped to it as a hot reg. I have no problems clearing either second stage reg. Sometime I get a wet first breath but it clears quickly with a quick oral blast.
Regarding the FT1s, they just work in the background with no perceptible indications. As far as rigging goes, I dig them. I really like the straight horizontal hose configuration. While some might prefer their hoses to point down towards the bladder, I didn’t like the unnecessary stress on the hoses of other regs or their interference with my bladder’s elbow. Now, I have no stress on the hoses. I clip of my SPG to my left shoulder D-ring so it’s also relaxed.
I’m just a baby diver so the deepest I’ve been with my DR kit is 50m. No issues over a 30 minute swim at that depth.
Anyways, I really like my DR kit. I think you can buy with great confidence.