No problems here
I've been using a Samsung S5 Neo for the last 5 years, and it's been exposed to all sorts of walking weather and beach holidays. The USB port needed to dry out before you could use it for charging, but that's all. Otherwise it was pretty bombproof. It's finally given in (the phone is OK but the GPS is dead, and the version of Android stops some stuff working), so I've moved to a Samsung Xcover Pro which I expect will do another 5 years.