My previous cruising experience: Oceania, Holland America, Royal Caribbean, Viking.
Crystal Symphony is a lovely midsize ship with all the amenities you would expect. The pricing is "all inclusive", and Crystal comes pretty close. The most obvious exception was internet access, and that will be free on Crystal cruises, starting later this year. You can find plenty of information about the ship elsewhere, and you will like what you see!
Service truly stands out, all over the ship. I have enjoyed my previous cruising, but this was the best. Waitstaff, room service, senior staff - they were all wonderful.
The cabin was nice and much like I expected. The little bathroom shines with double sinks and shelves for him and her, although using both at the same time is problematic! There are nice toiletries and ample room to stow your things. There is a tub/shower combo. I used the king bed configuration, which was quite comfortable. There is plenty of closet space and luggage storage under the beds. The TV with cable service has a built-in DVD player, and the ship's library has a nice selection of DVDs. In-room WiFi worked well, and WiFi coverage was pretty good throughout the ship. Fresh fruit and flowers in the cabin was a nice touch. The refrigerator is stocked, and that is part of all-inclusive.