Old town lovely area - lots of armed police keep area safe. Other areas very poor and very very persistant street vendors - don't make eye contact if you are not going to buy something they will follow you for miles otherwise trying to get you to buy. I found that out when I asked the price of a T-shirt.
Some poor beggars which I found hard to resist but was told to give to them nakes matters worse - still felt bad though.
Emerald shop which all the tours go through would have been really interesting except for about 30 female shop assistants who stalk you around the shop, you'll see what I mean when you go there?
If you go up the Monestry where the 14 Stations of the Cross are - be prepared for steep hilly roads - scary in those old vans - made it up and down okay though.