Unreliable, which is a cardinal sin for a travel SIM
The problem with an eSIM is that you can't activate it until you arrive at your destination, so a fair bit of trust is involved. Etravelsim got generally positive reviews and was a good price, so why not? Well, I installed it when I arrived in Croatia, and I had no internet. Luckily I had activated global roaming on my physical SIM, because I'm paranoid, and I was able to order Ubers etc. Tech support confirmed I'd installed the eSim correctly, and after several hours of back and forth and multiple phone restarts, they got it working for me by doing something at their end. It was OK for a couple of weeks, but then I crossed the border into Slovenia, whereupon it stopped working. No internet. So I switched to my physical SIM again. After another few hours of back and forth with Tech Support they made a lot of suggestions and asked me to restart my phone several times. At time of writing, it still doesn't work. It tries to register with a network for a few minutes, then gives up and tells me to try again later. Maybe it will start to work again when I leave Slovenia, but I'm not hopeful, so I'll have to use my physical SIM sparingly. Even if tech support manages to get it going again, it's been a massive waste of time. Edit: while you might be able to activate your eSim before your trip, you won't know if it will work until you arrive at your destination. In my case, it did not when I arrived in Croatia, and it stopped working when I crossed the border into Slovenia. Tech support were responsive and ultimately got it working, but the last thing you need when you're at an airport after 2 full days of travel is to be on Whatsapp to tech support for a few hours. My order id is 819560 if you want to verify everything I've said. Edit2: while driving from Rijeka to Zagreb, it dropped out again, so I lost real time traffic updates. Traffic in Croatia in the middle of summer can be incredibly congested and come to a stop unexpectedly, so real time updates can be critical if you need to be somewhere at a particular time. It might have been a network coverage issue, but my physical SIM came to the rescue again