As mentioned before yes there is a vibration all the time but after a while you don't notice it.
The entertainment is very good,hats off to Richard Grey the guy in charge of it all everything runs very smoothly .The shows were first class the 2 comedians were good especially Peter Piper,and also Holy,Angharad and Lewis were very good in High Spirits.
We only ate in the Lido deck but thought the meals were very good,the pizzas out on deck were excellent and the mid-week barbecue was also good ,only problem was that the food wasn't as hot as it could be,the coffee isn't too bad if you use half coffee and half hot water and there is a good selection of teabags.
The bar and waiting staff are all lovely and friendly as well so all in all a very good time was had.
We did our own thing on the trips but found no difficulty doing so Venice and Dubrovnik were the highlights but all places were good apart from Katakolon which is tiny,more time in Athens would have been preferable and only half a day in Katakolon.
all in all would I reccommend this trip a resounding yes