I had the Lifeproof for a while but I switched to the Otterbox Defender. Did a side by side comparison.
Lifeproof Pros: Waterproof, etc.etc., Slim profile.
Lifeproof Cons: Hard to hear when everything is sealed up (even with volume on max), very tight charging port hole (NONE of my aftermarket charging cables fit; only my 2 original Apple cables [I use an Apple cable to watch Netflix in my bedroom at night & had to use an adapter = pain-in-the-butt), Flashlight covering is small and limits the amount of light coming out, A slight bit of room between the screen protector and phone (meaning you must be certain to make contact with the phone screen when pushing down). Plastic case slips easily in my fingers.
Otterbox Defender Pros: Very tight fitting case. All 3 speakers, 2 cameras, charging port & the LED flashlight are NOT covered (sound is great, pics are fine & the flashlight is MUCH brighter. Also, ALL of my aftermarket chargers fit = no more adapters [I use the Apple cable to watch Netflix in my bedroom at night). Screen protector is right on the screen (any touches feels like the phone itself). Rubberized outside has good feel, grip. Comes with swivel belt clip/holster.
Otterbox Defender Cons: All holes open = NOT waterproof. Slightly bulkier (but not by much but MUCH better than their old style).
Here's the dimensions for the 2 boxes:
Lifeproof = 2.6" (W) x 5.08" (L) x 0.52"(D), Case Weight = 0.98 oz.
Otterbox = 2.7" (W) x 4.80" (L) x 0.80" (D), Case Weight = 1.9 oz.
I LOVE the Lifeproof waterproof aspect but the Otterbox just feels better and works easier.
Did you know Otterbox is working on a new Armor series? Due any day…
Hope all that helps. Good Luck.