I can’t give feedback on how good they are at the track or street (as I just installed them) but I went ahead and got the double adjustable QA1’s (with 324 possible damping settings) for the front (an old van with no other options for adjustable front shocks) Having experience setting up sport bikes with fully adjustable forks and rear shock I can already see the benefits of the doubles just in being able to set a baseline for drag strip, or comfortable drive, up to aggressive handling with tons of room to fine tune. As to service life, durability etc remains to be seen but I have to agree, do it once and be done.
