No issues so far, put 1k miles on it since install
I guess the only issue you may encounter is IF the pulley of your new alternator is SMALLER than the stock. According to them, the armature has been known to break the ends of the wires above 16,000 RPM, which is why they noted the 5,000 RPM limit.
Again, that was for my application, the question is if your pulley is smaller than stock, if not, then no worries.
The tensioner will adjust to a given point, but can lose it's rated tension when near the end of it's travel.
If the pulleys under a good load aren't too hot to touch you should be fine.
The point of my ramblings, a buddy of mine was going on a 900 plus mile road trip and he wanted to change his serpentine belt. I told him to get it from the dealer that way he knows it's the correct size but he picked it up at a local parts store.
Couple days driving to work was fine, then the weekend on the trip they called me and said they were hearing a squeal. I said pull over to the next service station and have them put on the old belt that I left in the rear of the vehicle.
They didn't change it and ended up on the side of the road losing either the water pump or the alternator from heat, and had to get a 50 mile tow and a hotel room for the night.
Just looking out.