No bad if you mix it with something else but by itself it hurts like a bitch...
I did my first sust only shot last thursday (usually mixed with eq, but I uped the dose of sust, so I have to do a single sust shot) My ass still hurts. I'm still walking funny and hard to sit on anything hard. Really hard to go tanning!!!
But hey, I'm not complaining...the pain is worth it when you look in the mirror!!
Oh ya, I'm talkin about the testanon.