I'm on a 5s right now. Although rare the 5s sometimes locks up, freezes, etc. Supposedly this was fixed with the SE.
I would get newer like the 6s but the cost is still to much for me. I need a headphone for my hearing aid neck loop anyways.
Besides, why not just get a 7 instead if I could do that? The price is virtually the same.
Read more: Should I buy the Iphone SE?