I've booked Virgin for my 60th birthday cruise next year. Very much looking forward to trying something different. As well as my other half, we are taking my 87 year old mother along, who is more comfortable on Cunard! Not sure how she will feel about it but she's willing to give it a go.
One of the reasons we changed from Celebrity is the cost from Southampton next year, especially as we need a single cabin for my mother. Ended up paying £2200 for a sea terrace for my mother, which includes $600 bar tab and another $600 sailor loot. Some of the Apex sailings next year were more than that for an Inside for one person. Got flights to Barcelona on air miles and saving a few $1000 in all across both cabins.