Our waterrower was chosen over the concept 2 because it has to live in our tv room. So. The wooden frame and whoosh of the water help too. No issues with leakage. Either waterrower or user! 
Lots of people have already replied with excellent comments, so this is just to share my recent personal experience with rowing and cycling.
Iām 59 and was forced indoors for medical reasons and bought a Kickr to complement my wifeās Concept2. Over six months Iāve found that increasing my rowing endurance coincides with increased turbo hill cycling comfort and increased FTP. Regular hour plus rows have been the most beneficial, no heroics just keeping steady at around 13,000m/hr pace.
I also do interval sessions, usually following a Concept2 workout of the day that I get emailed, or simple 500m intervals/1 minute recovery x10 plus.
I treat turbo and rowing sessions as either/or, skipping the turbo session from my Training Plan when I row.
A big side benefit has been broadened shoulders and upper back, plus strong core and arms, all of which gets missed when cycling.
Boredom? I find music, coupled with a clearly identified objective and then alternating focus throughout (cadence / power / arms / legs / etc) keeps every session fresh.
On the turbo Iāve obviously used Suf (strong workouts as we know), but also Fulgaz (excellent outdoor simulation) and Zwift (for me, demotivating). Next off for three free months on Bkool and then perhaps TrainerRoad.
I just did the new Revolver on the rower. Well done @David.McQuillen.KoS for the remaster. It was glorious suffering. I was properly spent at the end of it.
Thereās no stem to look at, so you actually get to see the video. I may try 9 hammers on the rower next - as Iāve never actually seen that videoā¦

OK how did you get this to work? Ergdata on the phone via BT and SYSTM connected via Ethernet? It actually accepted the PM5 for power and cadence?
Also for the person who liked the idea of a rower but doesnāt want to overload your legs, you want a Skierg.
Yeah the PM5 can connect to a device running ErgData via Bluetooth. The older pm4 also can connect but not via BT, it requires a physical adapter.
I donāt know if they are actually using sufferfest to play the workout exactly as in controlling power targets, I donāt see how you could or why you would tryāthe rower doesnāt really work that way, and cadence is nowhere near apples to apples (on the rower, 30 SPM is very, very high)
rather I suspect they are just using the workout as a visual guide and using RPE to determine intensity, which wouldnāt require any connection to the rower.
Oh yeah you canāt erg mode the erg, ironically, and cadence targets would be right out.
Iām mostly curious if you could use SYSTM to record a rowing workout. Iām currently using EXR, and itās great, just always interested in trying something else.
Good question and I see what you mean nowā that I do not know!