I have two of the ss 3-15 and love them. Both with the milquad reticle (mil/mil scopes are awesome). One in ffp and one in sfp. Awesome glass and comparitively light weight and compact. The reticle and turrets are outstanding. Very easy to use for holdover shooting or very quick, accurate, and repeatable turret dialing. Personally, I prefer the sfp for short distance or tight woods shooting and the ffp for beyond 35 yards and long range shooting. I use the sfp on my Ataman M2 ultra carbine .22 and the ffp on my Cricket .25 Carbine.
Can't wait to see what comes up tax day sale! I would love to own their HD 5-20 for long range shooting but the price is a little steep to get that level of glass. Maybe tax day!