it literally takes 10 seconds to throw some ginger into a food processor and whizz it up. i leave skin on. the wife will run a peeler over them if she's doing it.
so i don't see the point in buying frozen. when you can have fresh within 2 minutes.
garlic is a bit trickier as you need to peel it. you can use 2 metal bowls to rattle the skin off them in seconds. or a rubber roller to get the skin off quick. again it takes 2 mins to make some. i don't see why anyone wouldn't use fresh.
i find they are okay but their motor does go after a couple of years. i can usually smell burning off them when making pakora sauce, etc. they are okay for garlic but onions and ginger can be tough. may need to throw in some oil to help it or chop them up a bit before throwing them in so it's not as chunky.
Mind arrived yesterday. Obvs couldn't resist trying out right away. One large bulb, large chunk of ginger, and a single chilli seem to bend well. It's larger than I thought though. It probably would just about blend smaller amounts but you'd have to keep opening it up and mixing the chunks back in. Opening is a pain as it has a seal for blending liquids.
I did add some oil, which helped.
Fingers are still smelly this morning. I think I'm just going to have to accept defeat on that front.
All in all I'd give it a 6-7/10