I tried SubQ a few times, and it simply didn't work for me. Huge red lumps that took several days to go away.
When I was injecting SubQ TRT made with cottonseed oil I also got angry red and sometimes itchy lumps - almost like an allergic reaction. I stopped getting those lumps when I switched to grapeseed oil from Empower. Now I alternate SubQ and IM for no reason other than I feel no different with either method, so I'm hedging my bets as to which method is ultimately proven to be better.