I recently have tried both the Alabastro and the Perla, and love both sets very much. After playing much lower tension strings previously, I was also pleasantly surprised at how they "felt" to play... not really feeling that much like "high tension" strings, or causing any issues for me with ease of play.
For someone wanting a slightly brighter treble, the Alabastro is excellent. And for my personal taste with my guitar and technique, I have settled in on the Perla, which gives me a slightly fuller, rounder tone. Both are very high quality, "complete" sets that have their own merits, and I enjoy both.
Like others have mentioned in previous posts (previous threads also) I did have one incident with a high E string that did not intonate properly. It was six cents flat at the 12th fret. I let SBM know about it and they sent me a new set. I have not had any issues other than that one string. Every other string/set has been spot on with pitch.
Like others on the Forum who seem to collect random strings from around the world, now I must figure out what to do with that giant pile of other strings in the corner of my music room!