Most Banfields are better than nothing but only you know what your location is like. If the wrong meds were prescribed once, I wouldn't be too excited to return. If you can't afford anything else though, then maybe give them another try. Is there another Banfield in your area?
I'm sure blood work is about the same in-house and out but Ellie's vet prefers the platelet count be done at an outside lab if there is any question about it and in general if I had the choice, I would use an outside lab for most things unless I didn't feel like waiting for results.
Here is a good read on jaundice:
Jaundice in Dogs