Portofino Bay is the most expensive but I HIGHLY HIGHLY RECCOMEND IT.
We have stayed there before and our staying again this Christmas. We also travelled with a young son and he loved the resort.
The rooms at POB are excpetional, this is mainly the reason we choose to stay here. They are beauitfully furnished and come with BIG BIG luxury bathrooms with Italian marble. The rooms are so spacious and really really nice.
POB has a wonderful casual, relaxed feel and the harbourside setting is great. The rooms seem to be spread out nicely and are all in seperate Italian buildings, most of which overlook the pool area or the harbour. The swimming pool is a nice size and always has lots of loungers around the edge. When you arrive in the lobby you will realise how beauitfully the meditteranean/Italian theme is carried out. The POB spa is also a GREAT place to go for a massage and have a relax a wide range of treatments are on offer. Delfino Riviera is a really nice Italian restaurant which has lovely speciality food.
The whole of POB is really wonderful and we personally cannot fault anything about our stay. The staff were great, The rooms were excellent and the amenities were top-class.
Portofino Bay comes Highly Reccomended by us, but we haven't stayed at any of the other Universal Resorts. We looked around HRH and it did look very nice. If POB was a disney hotel I think we would be there every time!
Which ever Universal resort you choose I'm sure you will have a great stay, The Universal Express Pass is GREAT.
Richard.