I like ace for the reasons most vets recommend it, more control if things get rough. I just started my 4th week, second time using tren. Thirty mg ED 1st week, 40mg ED 2nd week, 50mg ED 3rd week, currently 57 ED this week for 400mg a wk.
I use a slin pin on small muscle groups so ED injects are easy. It could just be bro-science that ED injects minimize sides but it has worked great for me and I have no plans on changing that or switching to enth in the future.