Excellent for the price. I bought one of these for all the iPhones in our family. Great for vacation, especially if near water or salt. Also good for working outside or in dusty environment (mowing lawn, wood working, etc.) to keep crud out of your phone. I also found it great for bike riding to keep phone somewhat accessible (rather than in the bag on my bike or risking a $600+ phone in a handlebar mount. Limitations: Took practice to learn how to get phone in and out of case efficiently. Although can access phone functions while in case, it does impact touch sensitivity so not great for some games or other touch apps. Can't use camera while in case (back camera is blocked, front camera usable but degraded. Can't used wired headset (bluetooth works fine of course). Case gets brittle with prolonged opening and closing and can tear on seam near zip locks.
The product works as advertised, with full access to the touchscreen and all buttons. Like another reviewer said, I did have a little trouble getting the phone OUT of the waterproof case, but it wasn't that bad. Unfortunately, my phone has a nice new otterbox case, and that will definitely NOT fit inside the waterproof case... not an easy things to remove for a quick fishing trip.
Overall, this is a good product... IF you have no case/bumper/protector on your phone, or don't mind removing it in order to use the waterproof case.
It would have been nice if they would have mentioned in the description that the phone is only guaranteed to fit when devoid of all other cases/bumpers/etc.