The controller itself is great and worth the purchase. Wait until Prime Day which is happening again October 10th when it'll be a little bit cheaper. As for Luna itself, yes it's worth it if you're a casual gamer. If you're more of a hardcore gamer look elsewhere. More on reddit.com

People gave stadia so much shit yet use Luna and say virtually nothing negative..... More on reddit.com

I've always been interested in cloud gaming, and I truly believe the world wasn't ready for Stadia...yet. However the Luna controller has to be one of the best controllers I have ever felt. The textures, the weight, etc. it just feels right. More on reddit.com

Luna is the cloud gaming service from Amazon. If you have Amazon Prime, you have a small selection of games to choose from. If you pay for membership, you have a larger selection. Nothing is installed on your computer to play the games- it all works through a browser. If you use an Amazon Firestick, there's a dedicated app for it. All of the hardware is on Amazon cloud servers  they run the game and deliver the video feed to your browser.  As you can imagine, there's a bit of latency involved normally. Amazon runs the game, sends the video to your PC, you see action on screen and hit a button on your keyboard, which sends the action back to the server to execute. It can work with a Bluetooth controller connected to your PC, but that adds a bit of extra latency as Bluetooth has its own delay. A Luna controller connects to the Luna service directly via your wifi network to remove some of that latency. It's not required at all to enjoy gaming, but some people like the extra responsiveness. If your father wants to play on a fire stick instead of a browser, the controller may be necessary. More on reddit.com