I think they've forgotten that they have by far the worst network out of all of the big three.
Do they really think that many people are going to pick their service for 50 MB more on their cheapest plan, or that they can compete with AT&T's network to the point that they'll charge the more for the 3GB data plan?
I try to like Sprint but they need to take it a bit easy. They should have done $25-30 for unlimited data and maybe a bit more for unlimited + hotspot.