I started at 2mg, titrated up every 4 weeks till I got to 8, where I am now. Paired with HGH with TRT and it totally recomp'd my body. I have a 6 pack now for the first time since I was heavy in MMA 20 years ago. The appetite suppression is ok, but tirz is better. I get about a 15 bpm HR increase which paired with HGH turns into a little more than that. I'm dropping down to 4mg this week to see if the heart rate sides go down, because I'm ready for maintenance dose now. I have heavily considered swapping back to tirz for my maintenance but we will see I guess. It's an amazing drug, and does some amazing things for people, but definitely start slow.
And IMO, the reason people are swearing by reta more is because it's the new kid on the block. And we are programmed to always want the latest and greatest. IF I had to do it over again, I'd have probably just went with Tirz. It's cheaper and effective. But I already have a pile of reta so that's why I stuck with it.