It sounds good, the only thing that puts me off is you have to fly to Palma, I would have preferred with two little ones to drive to Southampton, I hate flying with little children as they get bored after 10 minutes!
On a plus side they have a night nursery, can you believe their are childcare facilities til 3AM each morning - not that I would leave my kids til that time. There is a free creche from 9am - 12 midnight each day and they you can top up each hour if you want til 3am!
Got a quote it's around £2K for the four of us for a week in July. Have to work damn hard to pay for that I tell you!