Internet is free for one device with th $75 transportation/gym/internet fee with an exchange. Other devices will cost close to $80 USD. Even with our free WIFI with multiple devices as Luxxe owners we tend to choose to upgrade to the higher speed because we are used to it at home. I am willing to give up a massage to be able to watch my Jayhawks play via streaming video that is fast enough that I can watch them! The "free" is not fast enough. For just email and basic web surfing, it is OK.
I think it depends on when you go in terms of speed.
In NV "last year" (January 2015), there was no difference in "high speed" vs. normal. (according to speedtest). I was able to stream Netflix just fine (via the app, not the PC) on normal.
Ironically the Netflix PC version won't let you watch anything because you're not in the US, but the Android APP will. How stupid.
Tivo Stream (to my Tivo's at home) worked just fine as well (no quality difference with high speed vs. normal).
However, supposedly the resort was not super full, so that may explain the difference as well.
wi-fi by teh Grand Luxxe pool in NV was atrocious. You'd have 5 bars or whatnot of signal, but NOTHING worked. Everyone was complaining about it. Grand Mayan pool area was only marginally better. Strong wi-fi signal, but stuff would work for about 10 seconds out of every minute. I gave up for pool areas.
But T-Mobile just announced free data and 4G speeds for Mexico now (always had free data and texting, just not at 4G), so we'll see how it goes. Although in Jan we'll be in RM location instead.