I've been on X-Gels for approx. 5 weeks. I started out taking 1g(4 pill) then went to 1.5g (6 pills), now I take 2g(8 pills) preworkout.
The pump is amazing, (almost too amazing, depending on which body part I work).
I'm making gains week after week, as far as what I'm able to lift. I've been sticking to the same routine to see how my strength progress is going.
It's not only how much I'm able to lift, it's also how I'm able to finish that last rep with no spotter. Sometimes it looks like I bit off more than I can chew, but I just press through and I know ARA has been a contributing factor.
As far as side effects, I haven't really had any bad ones. I haven't taken fish oil since starting and have only had fatty fish (salmon) a few times here or there while on X-Gels, which is more of a coincidence.