I too have sailed Jewel twice and had been told its the most beautiful ship some have ever sailed on. I was in a Junior Suite.. so of course thought the cabins were huge.. and very nice. I also did a solo cruise by myself in a OV and thought it was great.. but by myself, I had plenty of space for just me.
Loved the glass elevators.. the self leveling pool tables were pretty funny moving the last day in the waves by themselves.
Nothing against Valor.. but I would love to do 7 days on Jewel. Its a really special ship. I love any cruise though, so you cant go wrong.. but Jewel to me is special.