Love the string..Only downside for me is after about a weeks play feel kinda starts to fade so I change out..

It's easy on my elbow and and it plays very well. They last a long time too.
I will keep reordering.

Very nice jacket!

Just taken delivery of 2 more reels of Square X Sharp as it is gaining popularity with some customers both with power spin players and even with more control moderate power players, including a former Badminton tournament player who loves the fact he can feel the bite from the strings on the ball, I think apart from the unique shape the gauge is also a big factor. Other strings currently in use Octo, Quadro, Pro Feel & Multifiber X are all getting noticed and gaining repeat requests, one player after trialing has purchased his own reel of Pro Feel previously using Alu Rough or Tour Bite.
Have trialled Sharp & Quadro myself struggled at first having not played with Poly for a very long time but am now beginning to see some improvement shall have to try a couple of fresh restrings soon to work out a preference.
Overall getting good vibes from both the customers and myself from the strings and from Ivor & Sergio.
The only drawback at the moment is our local distributer is not intending to carry the Sharp and is low on some other stock.
Ivor has allowed me to order direct - am an Ambassador and trying to push the brand locally - on some but it does take a month and not sure if I am going to get clobbered by import duties if I was to place a large order but that is life.

The banner looks great! Everyone who walks into our courts sees it and asks our players about YTEX!!!!!

I love these strings! they hold tension for along time and have great spin!!!

I have a couple people i string for who love these strings. Both are USTA 4.0 and use these in a hybrid as teh mains, one with PolyTour Pro 17 as crosses and teh other with quad twist.

I am also trying this in the mains. Gets good topspin, and OK power. I really notice the differences on the slices. The strings cut into the ball more and I get less lofting on the ball. Also find them very crisp on volleys.

The strings are great!

Really pleased with the feel and power combo. Looks great in any racquet. Can’t beat it for the price! Subbed it for technifibre razor code in a client’s yonex e zone and he loved it!

I have been using these strings last few years and love them. Only ones I will use...

I ordered the strings early Sunday morning and received them Tuesday! Great service. The Square X Sharp, 18 gauge, are at least as effective as Hexagon X and Quadro Twist, if not superior to them regarding spin. Durability may be a little shorter, but for my level of play (3.5), it isn't that significant. I have them in my Head Extreme MP Graphene at 45 lbs, and will use these as my primary string from now on. I'm sold on YTEX!!

This string allows deep penetrating baseline drives with lots of top spin while maintaining control. Great durability as well.

I switched from Gamma Glide to Protour Blue 16, and like it a lot. It is a very smooth string and provides good feel and manageable power. Have a couple others I string for, and they also had the same sentiment.

Experimenting with Hexagon-X, Quad-Twist, and Octo-Twist in the mains. Stringing at 50x48

Even at the low tension of 45 pounds it was very dead on the VCore 95 with the 16X20 pattern. I had to cut it out after a couple of drives went way too low below the net.

The best strings I have used thus far. Nice pocket on groundstrokes, along with the added spin. Highly recommend you give them a try. I have to admit they are a bit hard on the fingers when stringing the racquet, yet they're worth it.