They are perfect, they can be adjusted either from the remote control, or from an app, or from a button they have on top (which, when pressed for a long time, turns them off and on in the same pattern).
They have a lot of programs with various effects and colors!
Ideal for RGB lovers, they also work for the Christmas tree (ideally white, they fill it well up to 1.60) although among the dozens of programs they have, they didn't think to include any purely Christmas ones, so for some it might seem a bit circus-like...
For a plug, they have USB, not a socket. (they also work with a power bank!)
Instead of the app they mention, I use the Symphony Lights which is almost the same (and from the same company) but with a few additional programs.