This pick may be only 1.2mm thick, but it definitely feels as hard and as durable as a 2mm+ thick pick. Its double-sided rough surface eliminate all feelings of slipping or looseness and you immediately think to yourself "the only way I'm dropping this is if I let it go", i.e. its grip is what you want to feel when holding a pick - comfortable and stable.
This is more a matter of preference, but I find it to not be ideal when playing an acoustic guitar (at least for strumming). Some people like to play acoustic guitars with thick picks, but I however do not and if you don't, you should search for a thinner option. I like to use heavier picks on electric guitars and it feels absolutely superb there. I hope the sandy side of it won't peel off or degrade over time as it plays a huge role in what makes this pick be what it is. All in all, thoroughly satisfied!
