Excellent service!
The young chap in the shop speaks perfect English and knows what he is doing.
I bought a SIM card for Meditel in Chefchouen on the way to Fez but it just wouldn't work on the internet on my phone.
In Fes, I was walking to the Blue Gate from the bus station and spotted the "Cyber" sign outside the shop, so popped in. (its directly opposite Nagham Cafe)
The chap had a look and said its a problem with the sim card - I had to cut it down to size so probably broke it - he said I can get a replacement if I go to a Meditel shop. I just wanted the internet on my phone and he seemed know what he was doing. So bought a Maroc Telecom SIM from him. A couple of minutes later it was all installed, all working with 3g reception and 4gb data for a month. All for 90 dirham Bargain and highly recommended.