Since the thread title doesn't mention a specific Eachine Googles model (but remarks were made, at least up to now) about the Eachine One model, I will give my feedback here about my recently arrived Eachine Two Goggles.
The view field angle is enormous, cannot say if it's 78 degrees as advertised, but you cannot wish it could be larger. So when someone would say this 5" screen is less than Headplay's 7", tell him it's nonsense. The small 35 degrees view field angle offered by any FatShark googles it looks like a toy compared to Eachine Two. A 35 degrees model cannot offer the full FPV immersion of a 78 degrees.
I'm glad Eachine resolved to their Two model the 16:9 vs 16:10 screen format issue, because it was a true concern, based on other older reviews for the Eachine One model.
For those pilots that don't know yet, the DJI's HDMI module delivers not a standard 16:9 720p image (1280x720), but a 16:10 800p (1280x800). Eachine One model had an issue by not being able to cope with this deviation, so it was cutting the upper and lower imags limits, as
@John Locke already mentioned above. Eachine Two doesn't have this issue at all.
The image is great, it has typical HD resolution. Don't understand why in HDMI mode the color saturation adjustment is missing, it exists just for the normal analog video input. All rest of image adjustments (brightness, backlight, contrast) are wellcomed.
Battery authonomy (from max 8.0 V to min 6.4 V, value diplayed in the lower left corner of the screen) extends to almost 3 hrs of continuos usage, so way more than a normal flight session of 3-4 Phantom batteries.
I could't try the 40 ch 5.8 GHz receiver, since P3P/A's video doesn't run on that band but around the 2.4 GHz. I will call a friend that has a P3S, so this matter will be covered too. However, based on other reviews found on youtube, the 5.8 GHz receiver is solid, the diversity system with 2 antennas (one panel and one mushroom) functions as expected.
My short review has to mention a negative matter observed at the previous model too, and pointed well by
@John Locke. The used Fresnel lens with low focal length is not offering a confortable image for the eyes. Eachine Two misses a side sliding lever that will modify the Fresnel distance position in relation with the eyes. Longer usage it gives me headaches. I will find a solution (RHO lens ?) to solve this matter, because this is truly the single issue of these great goggles. Bought at 135 €.