We sailed on the AmaWaterways Prima for a spring trip in the Netherlands and Belgium during tulip season. It was a delightful trip and I would recommend the itinerary for couples as well as groups of friends. It was a seven-day river cruise that departed and returned from Amsterdam.
In addition to Amsterdam, our itinerary included Hoorn, Middelburg, Kinderkijk, Rotterdam, and Gouda in the Netherlands along with Ghent, Antwerp, and Bruges in Belgium. You can click each one of those locations to read about my experiences in each port.
The 162-passenger ship was well-appointed and modern. I traveled with a couple of girlfriends and we each booked a separate cabin with a French balcony. AMA does have some single supplement cabins, but we basically paid double for cabins on the Cello deck with a better location and the French balconies, figuring it would enhance our experience (which it did). For a couple, I would suggest one of the larger cabins or suites, riverboat accommodations are traditionally small. The Beds, bedding, and pillows were super-comfy. Two of the three of us had to have our in-room hairdryer changed for one that was hotter.