There are two things I always do with a new digital device, get a good screen protector and a good case. (And the biggest memory card that will fit).
The screen protector is pretty easy: I’ve used both Zagg and Armor Suit and prefer the Armor Suit, but not by much. Both work really well and I have an Armor Suit on my Motorola Razr V9x (still the best basic cell phone I’ve ever owned) that has lived in my pocket for many, many years without a scratch visible on the outer screen.
For cases I lived with an (almost iconic) yellow Defender case for my Blackberry Bold 9000 for about 5 years. It was awesome, indestructible, and fit the belt holder perfectly. Alas, it was no match for a random late night cab ride and early flight out of Dubai–can’t defend against that, can ya? Well, it lasted about 5 years, so no complaints. I contacted Otterbox to see if I could get a replacement silicone bit and they checked and only had 2 belt holsters left in stock from the entire product line. They mailed me those for free. Thanks Otterbox! (One did come in handy eventually.)
I got an iPod from United and, of course, got an Otterbox for it; one of the Commuter series. With a polycarbonate outer shell protecting the critical corners, and that backed underneath by a few mm of soft silicone, the iPod is extremely well protected. This is a well-engineered protection model, far better than just a layer of silicone.
A corner drop tends to generate very high localized pressure where the corner tries to merge with the hard surface it is being dropped on. Having the polycarbonate outer shell distributes that pressure load over the silicone underneath it resulting in a broad, gentile distribution of the impact load and minimizing the risk of localized overpressure which would crack plastic or glass.
Conversely, simple silicone sleeves without the polycarbonate layer, while adding critical padding and being fairly effective in most cases, can’t distribute the impact load nearly so effectively. This should not matter too much for a surface-to-surface drop where the impact force is distributed over the whole back or even an edge of the phone, but in a corner drop the silicone can be effectively mushed out of the way as the hard surface attempts touch delicate plastic or glass in a tragic romance.
I replaced the Blackberry with a Samsung Galaxy S3 and got a Commuter case for it. The case is very nice, not too big, but Otterbox did something very, very wrong. They rotated the polycarbonate tabs 45 degrees, covering the edges and not the corners. Why Otter, why? The case is still quite nice and it is the nicest looking and most comfortable I’ve found, but this is an odd engineering mistake. They talk about the “layers of protection” as a key selling point for their more expensive Commuter and Defender series, yet leave the most fragile corners protected by only a single layer. As protection goes, it is no better than the Impact since the corners are all that really matters.
The polycarbonate shell does serve to anchor the access flaps closed, which is an improvement over the iPod case, but this could easily have been achieved with a few well-placed polycarbonate fingers reaching around the case without making it difficult to assemble (too many fingers wrapping around the device make it impossible to snap the device into the polycarbonate shell).
Further, the textured silicone edges on the iPod case are actually really nice to hold, far more comfortable and slip-resistant than the polycarbonate edges of the S3 case (and make the iPod less likely to drop than the S3 as well). As an additional bonus, the iPod version exposes some textured silicone on the back surface making the case somewhat non-slip, while the S3 case is all polycarbonate on the back. Without some non-slip silicone on the back, the likelihood that the enclosed device will slip off a sloped surface and onto a hard floor or into a toilet or sink is much greater. While the case makes a disaster far less likely for the former eventuality, it is not waterproof.
While the Android OS just crushes iOS, and the availability of Android-specific tools and applications, particularly for security and encryption, makes it the best choice for a mobile device right now (though security, at least, is even less of a concern with a Blackberry – that’s the one thing Rim still has going for it – that and efficient use of data), Otterbox really could have done a better job with the case. Hopefully the S4 case will get it right.