Do you enjoy doing the same thing, all day, everyday? Do you have a soft spot for hating your flow team and lazy hardlines team members?
I have no idea what the pay increase might be sadly. As long as your in good standing you shouldn't need to interview for IS. Just be prepared to hate some of the other teams for petty things. IS can be super rewarding though in terms of helping guests because you can get them that raincheck or a replenishment time frame. I enjoy seeing something I scanned come in from the DC. It does get very boring but if you like routine it's right up your alley.