To be honest Lesley if I had the choice I would pick the new part. The rooms we had were very spacious, and the bathroom was paticularly big. We had a double for me and hubby and a twin for our two daughters and both were lovely. I love snorkelling, and it didn't bother me going over to the beach - it is a walk of about 10 - 15 mins (I don't rush on holiday!) but I didn't mind it, and you can always hop on the little shuttle bus - the driver will stop when he sees you walking. Initially I was determined to stay in the old part to be close to the sea, but in the end I was glad to have gone over to the new side!
The pools are fabulous on the new side - absolutely enormous, and all the same depth: about waist height on me. There are two water sildes there too. The main pool at the older side seemed so much busier and more cramped around the pool with sunbeds, and I liked the space around the pool at the new side (better sunbeds too). There was loads of room for us to float about on lilos - that wouldn't be possible on the old side, and I do enjoy that!
If the rooms are virtually the same price I personally would choose the new side.