I have a PlayBook with a metal frame that goes slightly above the glass edge, a plus and while the OEM PB Journal Cover is pretty decent to protect it, I fell upon a Roots rubber cover that goes over the back sides and front. Adds an additional thickness to the edges so if the unit hits on the face, the cover will absorb the shock. No, it will not help if there is a stone impact on the glass as much as the full cover but is easier to use and hold.
Not sure if Roots has a similar cover but we'll worth checking for and they are inexpensive to boot. I wish I could find something as good for my Nexus phone.
Not surprised about the Apple maintenance problems; I was not impressed how they dealt with my son's warranty issues related to his iBook and the replacement we finally received only after I explained I was a lawyer and it would not cost me anything to take them to court and would appear there were patent defects of the iBook and a basis of a class action suit. After the letter was received, the unit was replaced within 24 hours. It exhibited a major problem a month out of warranty. The way their warranty system worked related to replacements, my kid had only 11 months of warranty and an actual unit physically in his possession for about 9 months. The replacement had a major problem 1 month after the warranty and though Apple had the history in their system, they are good at tracking a unit's history from purchase through repairs, they would do nothing and wanted $750 to fix a $900 originally priced laptop for a rather simple component replacement, the thermostat that monitored the temperature for the fan to power up;natural most a $2.00 part. We bought a HP instead that has gone through 5yeafs of school plus 2, a free replacement power supply and free replacement of its screen by HP years after the warranty ran. When the screen went, my son hoped it would cost a lot so he could buyback new laptop. It is still his only laptop though he uses a desktop and tablet more these days.
I like OS X but would never buy a piece of Apple hardware again. I only recommend HP and Toshiba computers to friends as both companies have good product and very good customer service.