The 50mm SuperView (Erfle) eyepiece in a long focal length telescope gives a big, wide view of the sky that shorter eyepieces can't do. Coupled with an 8 inch f/12 Cassegrain, it gives a 1.2° field of view. The entire Moon fits easily in the view, as does most of the Pleiades/Matariki and the Orion Nebula.
For contrast, a 32mm Plossl has only about 0.5° field of view in the same telescope.
It's very easy and comfortable to look through, with plenty of eye relief even wearing glasses. Some eyepieces can be really particular with where you need to place your eye, but this isn't one of them.
If I had to pick a fault for it, it's a little lacking in contrast, but considering the price, it's extremely minor.
TL/DR: If you have a long focal length telescope, you should have one of these, and for $140, you don't have an excuse not to.

Weather and work mean I haven't yet had a chance to try out the coma corrector under the stars, but based in my short experiments with viewing tree branches about 150 m distant from my telescope, it looks like this coma corrector is doing a good job at bringing the entire field of view into focus. This is with a 10" F4.7 Newtonian, and with a full frame (35 x 24 mm) camera. Note that this corrector is a rebranded GSO come corrector (I don't think AstroNZ will mind me saying that), and so it does need 70-80mm back focus (so you'll likely need 20 to 30 mm M48 extension rings depending on what you're doing), and despite what the website says, it does also lengthen the scope focal length by a factor of ~ 1.1, so you lose a bit of field of view, but not much.

All in all for the price, I think this is pretty good value, and a great place to start you want to sharpen the stars across the field of view.

I haven't had a chance to try it yet, as it's a present for my son for Christmas, but Andrew was super helpful when buying!

Moon Filter 2" (#58A)

I was purchasing a weight for my ioptron tracker when I saw this tripod and I decided to purchase it as well to give my tracker its own dedicated tripod.being that this one was designed for my to be used on it it was a no brained. I have only used it once so far but it is wonderful and was easy to fit my tracker to. Very satisfied customer

Rechargeable is great. Handy size for pocket, and exceptional pointing in daylight conditions up to 60 odd meters.

Binoculars were easy to set up/focus for my eyesight (wearing glasses). Bundled instructions were easy to follow. Image is crisp and clean when focussing on distant objects(in daytime). Now just need some clear skies so can try them out at night.

A very convenient device for those times when you want to see the sun (or something very bright) and you want to still be able to see afterwards.
Easy to carry as it is small and flat.

Great scope, great accessories, but most importantly the best customer service I've ever seen from any business.

These arrived quickly and were exactly what we needed for seeing the partial solar eclipse! The flat cardboard rectangle ones are great if you wear glasses and find it hard to wear the goggle/glasses shaped ones, these flat ones you just hold up in front of your glasses and they are perfect :)

Arrived within 24 hours (amazing) as we ordered late. I appreciate that they are made to the ISO standard. Thanks!

Appears to be same model as the GSO brand on Aliexpress. Astronz price is same as if not better - shop local. Work fine on my short focus refractor.

Astronz 08" Premium Dobsonian Telescope

Planisphere for Southern Hemisphere

Very fast service. This worked wonderfully to view the partial eclipse last Monday morning.