I have now had the PEPESR set on for a couple of days. (I did not use the G - I put a Knobloch med/high carbon G on with them.)
First off, these do not feel like high tension strings. I use lighter tension sets often, and these are a comfortable tension.
The trebles have a slightly milky appearance, unlike the GLOW set, which are crystal clear. When I first put the PEPSR set on, I could find nothing very different or remarkable, but I tightened them a bit and went to make some food, letting them settle into tension.
When I returned to pick up the guitar, I didn't put it down for a good while. The most striking thing about these strings is how PLAYABLE they are. They feel very comfortable under the fingers, especially noticable during passages that I usually find a bit sticky.
Another thing I noticed was that if I vary the depth of attack with the right hand, there is straight away a clear and very noticeable difference in the tone - it is very easy to produce sweeter sounds sounds amid a dynamically varied passage. I am surmising that this has something to do with the tacky quality which Pepe Romero, Snr. describes in one of the reviews.
Truthfully, I don't know if they stand up to the hopes I had for what was described as the classic, old world sound that everyine fell in love with all those years ago. However I am expecting the sound to develop as they mature, and I must admit that there is something appealing about their sound which I just can't put my finger on or describe.
And of course, they are delight to play.