I'm running a 3.6-18 and 5-25 Mk5 with the T3 reticle. The 3.6-18 sits on a Mk12 and the 5-25 will soon sit on a .223AI bolt gun. I also run a S&B PMII 5-25 with an H59 reticle.
To put it simply, if I could convert the PMII to a T3 reticle I would do it immediately.
The T3 makes wind calls so easy. I took my Mk12 out to 1100 yards a few weeks ago and started at 870, which was the farthest it had shot to date. The range runs across a valley, so who knows how wind is acting out there. I guessed a 1 value wind hold, wasn't enough, took a second shot at a 2 value hold, was too much. Split the difference and was bang on at 870yds.
The scopes are also super lightweight for their class. So if you plan to be humping them, it's a good thing. If you plan to shoot at night, the reticles are even better to save you from dialing in the dark.
Big fan, I will likely flip the Razor GenII 4.5-27 off the SP10 and put a 3.6-18 T3 on it next.