A lot of guys at the club are using the Nexxus 48 EL, some the 48 XT, and now the green superselect 48 EL is getting popular. I only tried these briefly and the normal 48 EL seems to be a good one, the XT gave me no positive impression and the superselect I would only recommend to actual semipros/pros who receive hard and very spinny shots.
Most of the guys using this rubber are local league players and for sure this is one of the cheapest rubber around, so I get why they are using them.
The normal 48 EL I would classify as an easy to use rubber, it gives you a lot even if you don't put in a lot to your shot, so similar to MX-P and T05 concept. The 48 XT I don't even know who it's for, for me it felt yuck.
The superselect is more dull and slow than the normal EL 48, so it is only useful for pros who have power and who have to deal with powerful and very spinny balls. For local league players I think it is not suitable.
Also everyone buys these with the ultramax 2.3mm??? sponge and I think it's a mistake. 2.0 or 2.1mm should have way more feeling and pace. The ultramax feels too spongy.
For the price the normal EL series is a good choice.