Yes, I have tried them.
Can't find the old post where I talked about them...damnit. You can search around, there was one.
In short, they use hard imf padding. I don't recommend anyone using that in sparring. The quality is okay-ish/decent. They should be around the range of beginner/fitness gloves, don't think anyone who trains serious should take them as their primary sparring gloves.
At the end I am keeping the Fumetsu bag glove model, since the hard imf pop loudly on bags, I like that. Also like the green, the rhino and the weight, feels pretty nice using them in hot summer.
The sparring model is just not right, padding too hard. They use dual velcro system as well, but you wouldn't be able to pull it off yourself since there isn't a rubber grip.(Unless you bite and pull off with your teeth, then maybe. I'd never do that for hygiene reason) If you do hard sparring session, 100% not the right gloves.
If you do like karate or something, just point fighting, light tapping the other guy, then maybe. But at the end, Thai brands are just wayyy better with a small and reasonable increase in cost.
Some old photos:
Glove itself
Impossible to take off that secondvelcro on your own, pretty much.
This is how much you can bend forward.
Backward.
Sparring and the bag glove version. I like the bag version, offers a nice different feel.