I have used it - and also the Stonetech Enhancer Pro Sealer. Both were used on travertine - the Enhancer Pro used on our noche travertine coping and the Salt Water Sealer used on the light colored Country Blend travertine decking. Both seem to protect well against tree leaf stains, bird poop stains, etc. Have not spilled food or wine yet.
We wanted the noche coping to be darker/richer so that is why we chose the Enhancer Pro for it. The Country Blend we did not want to change the appearance at all - so went with the Salt Water sealer.
The SW sealer was harder to install vs the Enhancer Pro. Water based vs solvent based. Read the instructions closely - and make sure to not let it puddle and dry on top of the stone. Any excess that does not penetrate is supposed to be wiped off - otherwise they say you will need to "mechanically" remove the sealer from the surface.
Here are a couple pictures of the deck and coping. The blue on some of the travertine is painters tape that were marking tiles to be replaced under warranty during the first year.