@Lozen
I have stopped using my Suunto Spartan Ultra for swim and run, waiting for everything to mature a bit more… I started using a Apple Watch 4 for running and swimming. It has proven itself to be very accurate with regards to GPS and HR, in fact better than any GPS watch i have used before. It works absolutely flawlessly in the pool so no real need for my SSU right now. The major drawback is battery life, but with at least 6 hours in gps mode it covers all my needs for now.
But with that said, I really hope Suunto gets its swim and run offering together, love my SSU Copper version and hope to put it on soon again