So I installed my 2nd Aeotec device - a nano switch last night. It all went to plan and is now enrolled and working well. It's a really nice little product with it being so small and tucking in nicely behind the light switch. When programmed with the correct parameters, the Aeotec devices also provide their state to the z-wave controller, regardless of switching within the app, or via the physical switch itself. To me, this is so much more powerful than LED bulbs, as I can preserve the total functionality of the normal light switch while also have full smart capabilities at all times, as the lights are always powered.
Aeotec are due to release a very flash looking touch panel this quarter. It is designed to plug directly in to a little socket in the nano dimmer or nano switch and replace normal light switches (or fan, blinds switches etc.) to provide new modern look. It looks like you will also be able to install the touch panel as a replacement for light switches without the Aeotec smart device in behind. This being the case, it's a very nice solution as I don't necessary want to have all the lights in my house "smart" but I do want to have a consistent modern look throughout.
This is the advantage of the relays in the first place, in that they're behind any existing switching and the existing look of the switches. Rather than replacing one or two switches with odd looking modern ones.