I used to run a startup in this space. There's a whole bunch of devices out on the market, from Vuzix Blade and M300 to the ODG R7/8/9 to the Realwear HMT-1. They all have their strengths and weaknesses. What's your use case for them?
Coming from an industrial use-case, I personally really liked the Realwear HMT-1 — it performs like a champ, is surprisingly comfortable, is available as intrinsically safe, and has an easy-to-work-with team behind the scenes.
Would strongly consider skipping Glass EE, depending on what you want to do.