I had the Suntour compe V, on my Super Mirage.
It worked very well with my 52,47,36 set up.
Plus I rather liked the backward, high normal shifting.
It seemed more intuitive to me.

I not a purest, but I wanted to stay with a Simplex
group set on the UO10.
Simplex seems a little pricey for what you get though.
I had already upgraded from the broken plastic to the Super L J.
It seems to work well, but I think I might be at it's limit
with the 52,40,32 combo.