I had the same case on my iPhone 5s and 5 and a smaller version on my 4. It will definitely be my main case for the life of the phone, yes. I think it offers a reasonable level of protection at the level I require it, being that it's a composite of TPU and hard plastic.
Before the phone even got switched on, it got a Spigen Crystal screen protector and the case as that's how I always do it to ensure maximum resale value. You can just about see the screen protector outline at the bottom of the first picture. As the screen is rounded, the protector has to be set back from the edge more than previous iPhones and I think it looks a bit unsightly.