While the exterior design, grip and functionality of the case are up to par with my previous case from Speck for the 4, the fit to the phone itself is poor. As with the 4, I expected a tight, wiggle-free fit that made me feel like the case was part of the phone. This one feels a bit like a bar of soap in a hallway. Ok I exaggerate, but that's my level of disappointment.
Right now I have two business cards in the case behind the phone, which helps the fit down the length of the sides, but the corners still wiggle. I'm debating on whether to tinker with this further or just send it back.
If you are a loyal Speck user, I'd recommend waiting a few months till they have a chance to correct the fit. I'm sure they will.