Yes I've used it. My first experience using an eSim . NZ resident, but that's irrelevant, my phone is an iPhone SE which is the relevant part - allows one physical SIM and one eSIM.
I was going to go with airalo (they do more advertising) - but we had an odd set of requirements including swapping back and forth between Canada/USA plus Greenland ( many don't cover it) and Iceland. Alosim pretty much had identical pricing per a country as Airalo, but had a better region which allowed 1 sim to cover both Canada/USA.
Why I recommend though is that we did have issues activating it on my partner's phone - the initial USA sim worked but he needed to swap to a Canada SIM and we couldn't get it to work. Courtesy of a cafe's wifi (we were crusing which is a whole other layer of complexity) they spend some time with me on chat trying to fix the issue and then refunded the sim he'd purchased and he got a new one that worked. I don't know what the initial problem was but I was impressed they fixed it.
If you are not familiar with esims take some time to watch the videos before travelling but short version you can install and activate the sim before arrival - then when you turn off airplane mode on arrival it should turn on and work.
Summary - I'll use them again unless I can get a cheaper price with a different esim provider. I also noticed that they have good packages of European countries which is going to work for us.