I made these today using Ina Garten's recipe. The only thing was that I didn't have access to salmon roe (weirdly). Other than that, samesies. Oh, and I added capers for some reason at the last minute.
The result: a little salty. The smoked salmon bit was delicious, and overall a good idea, but next time I won't add ANY extra salt (or heavily salty ingredients, like capers).
I do feel like royalty eating them, though. That's always a big plus.