Snap on cases for iPhone 4s. Do they work?

Obviously I won't be getting Otterbox protection, but I have to know if they do anything to protect the phone? I saw the Ultra Thin drop test for the Incipio case and liked what I saw, but will a generic snap on come anywhere close?

Also looking at this case from Etsy. https://www.etsy.com/listing/184181387/iphone-4s-case-wood-iphone-4-case-iphone

Better or worse than a generic plastic snap case?

I'll also be using a screen protector. I just want to avoid the cracks as much as possible for casual use. I'm not going to be extreme and I'm not a total wreck that drops my phone all the time. But sometimes it happens and I know that iPhones are notorious for glass breakage.

Thin cases such as the one you are looking to buy won't guarantee protection. My friend had an otterbox and it still ended up breaking. So, you should buy it if you really like it, just be careful while using your phone.

I have an iPhone 4s too, and I've actually never owned a lifeproof or otter box case. I have always just bought generic $5 cases from Walmart and they have always protected it fine. Trust me I drop my phone a lot! It obviously doesn't guarantee protection but if you like it, get it and just be careful. Ps my friend had a lifeproof and her phone was still cracked when she took it out.