This article made me think about the gear I use to protect my devices. Like the writer of the article linked to below I have tried a variety of housings for my toys.
My newish Android phone is a cheapish Galaxy model so I have only invested in a screen protector for it. At the time I was seeking a cover I couldn't find one that I liked. I prefer a cover I don't have to open, one that will protect the device from bumps, that encases the back and sides of the device and is made from a soft pliable material like silicon.
The cover on my Galaxy Tab is of the type I described above. Coupled with a screen protector it gives the device which has survived a few drops adequate protection.