sorry so late in responding... only check in on occasion.
i had ivig for about 4 years. at the time i had rr ms and it gave me a boost. felt better after drip. had 2=day drip twice a month. definitely helped. a nurse came to my home, making it very comfortable.
one thing i had to do was get a port near my shoulder because my veins kept collapsing. it's really a lot better and can also be used for blood draws.
a few months ago, the ivig just stopped working. didn't give me energy, didn't make me want to do things. so i stopped the drip and am on ampyra instead.
good luck with the ivig. i swear it helped a lot. also prevented new lesions. had mri after ivig stopped working, had new lesions and am now secondary progressive ms.