I just bought an x4 for a very, very good price. It was like 12$ maybe, (2800hungarian forint).
Back in the days i used QPAD lowsense, Razer Mantis Control (biggest one), Roccat Taito King-Size, also tried QCK, Goliathus Control, and i have to say that so far this mouse pad is a very good choice for the price. I dont say that its good as the qpad was, or the mantis, but better than the QCK for sure. The surface reminds me for the Taito, but for half of the price, and this one is even looks more durable for me. 2days testing, and i getting used to it, very fast pad with low fricition, looks pretty accurate with my g100s, i love it so far. This can change, but i doubt. Im very happy with this pad, could not wish a better one for that price. I reccomend to everyone who wants a big, cloth pad for a good price. Dont buy Roccat Taito or Goliathus if you think this surface can be okay for ya, the quality looks good for me. The only thing what i noticed is a little bit negative acc, but this happens with every single mouse with me, on every single cloth pad. Even with a DA @ Taito, or even with an MX300 @ mantis. So thats not a big issue, its just me with my ultra low sens, and very fast sweeps. I think you would not be dissapointed if you get an Aegis, it was a very nice surprise for me. Reccomended by me, a former competetive CS player