A medina is a square where business is done, there are spice stalls, eating places which serve cheap food and rather nice and loads of shops selling cheap replica rubbish in the main. The stall holders are ok for a while with their cockney accents and jokes but it all gets a little tedious after a while. I felt a little uneasy in places especially the back street areas, there were small gangs of youths simply watching, so have your wits about you, zip bags up keep hold or put wallets in front pockets and put your hands in too.
If you're going to buy make sure you get what you pay for, one of our party purchased a bag and when they unwrapped it they got a damaged one. They will try and Sam you if you are naive.
At night things are a little frantic and precarious. Mopeds everywhere some with lights often not. The food stalls come into their own tough in a big group you were aggressively targeted which could concern some people. Be firm and say no, don't take offence to banter, the food can be around £3 and is nice, the washing up and drying of plates Nd cutlery should not be watched. There s no alcohol here as it is in view of the mosque.
Overall this is Africa and people are desperate for your money. Be careful what you buy as most is junk but go for the experience. One man helped us and took us via his shop, as they do in Egypt, Tunisia etc. we got some great crystals for clearing sinuses for a few pounds. He was a nice chap.
Danger wise no different to a lot of cities in the UK keep your wits about you and try it once, that was enough for me.