I've only sailed on Celebrity (this was my second - first was on the Celebrity Century, which they've since sold, in 2010). Mr Gfunk took a cruise on Royal Caribbean in maybe 2007 as well. We have friends who are avid cruisers and take probably 5-10 cruises a year. They usually go on Celebrity but will also do Royal Caribbean or Norwegian sometimes based on itinerary/timing/price. I asked him the other day if he's done a Princess cruise, and he said he hasn't but their reputation is "a bit older and slower pace," so take that as you will. My understanding is Princess and Celebrity are generally at the same quality level but Celebrity markets itself as a little more young/hip/freewheeling. I would generally describe the Reflection's decor as "modern hotel lobby chic," for whatever that's worth. If you're looking for a cruise and want to try something new, I thought (and still think) Celebrity is a really nice experience.

I will probably not take enough cruises to get past Celebrity's "Classic" loyalty tier for the forseeable future, but the perks at Classic aren't really that interesting anyway. I think the most exciting one was 10% off wifi.

​​​​​​​Also probably worth noting that a lot of the app's functionality only appears when connected to the ship wifi.