Hmm not sure who is 2-3 months in. Seems like a few started recently, less than 2 months. Adrian and Chino weened off it a few weeks ago as he felt it wasn't helping.
I'll share my experience anyway

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Overall I see an improvement with Beenie. Only catch is there's no way to really know if it's the Cabergoline, less IGF-1 output, IAA breaking.... As her numbers have improved recently I'm now starting to see behavioral/QOL improvements, small but they're happening

For me I won't give up on it. When we stared Lev and then shortly after Cabergoline we have tremendous improvement in her numbers. I can see why Adrian and Chino threw in the towel because there was no marked response to it. I think the trial, as small as the pool was, is indicative of the med seems to work for some and not others with no indication as to why. For us the cost was worth the try. Had it been one of the costly treatments I never would've have tried it.
I'm impressed with Jadi&Tiffany's response, to me its seems more likely its the Cabergolne for sure.
As far as GI issues I do notice Beenie is a little gasy

and her poo is normal to too soft (this after start of cabergoline). It fluctuates, some days its normal and other days its not but I've been giving her pumpkin and that helps. Other than that no other side effects that I'm aware of. I wish they could talk
Are you considering and concerned about side effects?