I have had Roku before. Sold it, existed without for a good long while but was lured back in by the need for a real simple, compact and easy streaming solution. Got the stick and I like it.
I have a smart Blu Ray player but the apps are horrible and the interface is clunky. I am looking forward to travelling with the Roku a bit later this month and I expect it to fufill most of my needs.
The service is alright. I've only had it for a month or so after getting rid of cable with DVR services so I'm still getting used to the whole streaming thing. I really miss being able to record the live tv stuff as most of the shows I watched are on at a time I can't watch them live and they're on channels that you have to pay to stream which defeats the purpose of getting rid of cable (which isn't really Roku's fault). As for the stick itself it works on my kid's tv which is like a 35" but it didn't fit in my father's smaller tv. I guess it depends on the size and configuration of the tv itself. It was too long to fit properly in his hdmi slot. But again it does fit in the tv we use it on anyways. So all in all I can't really complain too much. The stick works and the rest is just me figuring out what is where and getting used to streaming.
I took it back after a couple weeks. I thought I would like Netflix streaming but they don't offer even close to enough choices compared to old fashion DVD sent to the house. I was amazed with that. So after not needing Netflix there was nothing else that was of interest "free" for the average person. Your movie channels had very poor selection. There was British shows, cooking, shopping, etc (mostly boring stuff), and we get free cable here so there was absolutely nothing good that Roku could offer that didn't cost you extra. There certainly was enough of that, including Google Play, Amazon Prime. So to sum up, if you don't have cable it might be possibly worth buying Roku but for me it simply was not.
your stick is giving two old folks access to movies that are mostly good clean movies. i have having a problem with having to reset my stick almost nightly. seems too loose in its socket, but even so, we are thrilled with the entertainment it provides.