I am not a fan of spring straps because I cant determine if they are near to failure visually. I have used electrical tape to secure the bitter-end of the strap since getting my first pair of Jets in 1968 to minimize entanglement risk. A good quality tape like 3M stretched outlasts the strap itself.
I can't say I could always tell when my regular fin straps were going to fail, but I've not had a failure with my spring straps in the five years I've used them. Of course failure may be just a dive away. I have found duct tape worked great on my wings when I needed to protect the tube after a rip occurred in the outer bag.