I really like it so far. First and foremost, the cost is laughable. Because honestly, 70€ is way to fucking much to go blind into a game you're not even sure you gonna like (since demos don't exist anymore and there are little to no gameplay trailers nowadays as well). 70€ vs 60 or even 50 from PS360 era doesn't seem like much of an increase, but here in Poland given the exchange rate the games price has doubled (if not more) in the past 10 years, which is absurd. Granted, my salary has also more than doubled in that time, but I just don't see THAT much value in videogames, they simply broke the point that's acceptable for me, a game has to be truly special to my heart for me to spend 70 bucks on it.
Secondly, with GPU you get to play the games on PC if the games are locked to 30FPS on consoles, or play better with M+K, or whatever the reasons, plus of course you get all the games on XB consoles as well, on which you don't have to pay for Gold anymore in order to play online, the service is really a must-have if you own both platforms. MS just needs to add xCloud to GPU to boost up the value even further, so I can play on a laptop whenever I'm far from home/on the go.
Thirdly, it gives me the ability to try out games which I wouldn't even consider otherwise, since they're already there, often finding some really great titles which turn out to totally consume my time. Because again, the pricing is often seriously off, I understand that everyone wants to make for a living, but you just can't ask for an indie game 70 bucks like it's next CoD or GTA.
Now what's left is.. the games. Once all of those MS studios start pumping out their games and feeding the service on a regular basis it will truly become the Netflix of video games.