So finally took the plunge and thought I'd write a very quick little reviewette.
Its £7.99, so its a pricey app, but what was making it attractive for me was the possibilityof controlling any netwroked device.
My setup at home is a samsung smart tv, TIVO (virgin media in the UK), plex runs on the Samsung's dedicated smarthub app via my MBP.
(I also have an

TV upsatirs but thats irrelevant for this review, save that Roomie will also work it if I want it to).
So ideally what I wa slooking for was the option of having controlls on the watch that activated both my tv (and allowed me to use the smart hub) and the TIVO.
The app on ios is great, it requires triall and error, but the devices appeared automatically via their IP addresses and once added I could control them immediately. You can then set up commands such as arranging to turn on a device and set it to a channel. the functionality is unparallelled and so far i reckon I've got it doing about 10% of what it can.
It works with nest, for example, which will eb great next winter.
The one thing it cant do is turn my smart tv on, because the tv has no network connection until it is turned on but that apart I can basically now move between my tv, tivo, smart hub and plex and choose my media all from the watch.
best watch app I have seen so far.