i have been on sust250 for about 1 1/2 weeks (4 shots) but i had one of my friends do everyone so far...today i wanted to try it myself...oh the fun that was...i was shaking so much that when i tried to asperiate i pulled the whole needle out...which is good because i had a bad gusher so i must of either been in a vein or hit one...then i got my hand to calm down and i did it again in a different spot...everything was going good but i was still alittle shaky and had to press, relax, press over and over and on one of my breaks the needle came out again...so then i clean everything again for the 3rd time and do my last poke...got the rest in...but its kinda funny on the first inject when it poped out mid inject there was .5ml left so i got 1/2 in each spot...maybe that will leave less of a bump/bruise like the other 4 i had....no pain no gain right? 
