I stayed in Split in June 2009 with my husband, and we both fell in love with it. Prices are not too bad however it isn't cheap either. We ate at the resturants down the Riviera and enjoyed the food that they had to offer, mainly Italian.
People are very friendly and the clothes market that sells bags, hats, souvenirs etc near the Riviera was ok, with a good choice to choose from.
We also visited Trogir which is 30 minutes bus drive from Split, and found it to be very small but sweet and romantic town on the coast.
The only thing that I found rather disappointing is the choice of excursions. There isn't many at all. We booked the excurion to Krk National Park and it was amazing. However they didn't have any boat trips etc..
It was a very lively atmosphere, even though we went at the begining of the season. They had live bands playing down the Riviera and it was lovely to seat there in the evening at one of the bars and just enjoy the atmosphere.
All the bars/caffes down the Riviera we found to be brilliant expecially the ones at the top near the Pizza place and Top Shop, the seats were nice and comfy and drinks wern't that pricey either. Depending on what you drink but we found that we can have a drink for £3 for both me and my husband, however if you like spirits it would be a bit more then that.
We booked a self catering apartment through ClickSplit.com and it was in the centre of Split. Up the road of Sperun Resturant and 2 min walk from the Riva. It was a brilliant location for us, with all the shops, resturants and attraction so close by. Beach wasn't far away either.
It was a lovely holiday, and if you do wish to go there, do you reasearch well before hand, and I am sure you will have a lovely holiday.