I'm into week 6 of my first-ever cycle (10 weeks Sustanon (sust) 500 mg, 250 mg sat and tues) I've got ampules of Organon Sustanon (sust) from Pakistan.
I don't experience any pain during injection but the next day there is usually some soreness. The first couple injections, the soreness lasted for 4-5 days. Now it's usually only a day or two, although it does vary. Makes me walk a little funny and can make leg workouts a bit difficult (I'm injecting glutes) but all in all, I can work around it.
I've found it helps to warm up the ampules in a cup of semi-hot water before injecting them. That makes it easier to fill the syringe, inject and presumably thins out the solution so that distribution into the muscle is better.
It also hurts less if I inject slowly. I'm injecting 1 ml each time, so I take at least a minute or so to empty the syringe.
Hot showers before and after injection also help. A jacuzzi would probably be even better, but I don't have access to one.
I got a cheap Wahl electric massager/vibrator. It was about $20 at a local drug store and has a heat + vibration attachment. It's not the best massage unit, but I use it after injection for about a half hour or so on my glute and that seems to dramatically decrease the soreness the next day.
Finally, I always try to do a workout and get the blood flowing in that area within a few hours after injection. Deadlifts are great for this.
I probably wouldn't do another cycle with sustanon though. I'd go with enanthate next time. The reason for this is not the soreness. I can deal with that no problem. But I get the sustanon flu after most injections (though I haven't gotten it after all of them.) I just get mild (very mild, actually, but annoying anyway) flu-like systems that usually start about 24 hours after injection and last for about 24 hours. Ibuprofen seems to take care of the worst of it. But I still get a slight fever, body aches, and chills, and it usually gives me at least one shitty night of sleep (tossing and turning, waking up in a cold sweat.) This has happened almost every time I've injected. Maybe 2 or 3 of my injections have been flu-symptom free. This, like the post-injection pain, seems to have gotten better with more injections. But I just injected yesterday, and I'm starting to feel the body aches come on right now. I realize not everyone has these symptoms, but I'm certainly not alone on this one.
Next time, enanthate!
Good luck with your cycle!
) Anyway, I have taken four shots of the QV and I have had no pain...I mean nothing. The Golden Triangle was leaving me limping for 2 days. 
