What’s the Best eSIM for travel and work across multiple countries? particularly user-friendly

My new job means I’ll be traveling quite a bit, so I’m trying to find an eSIM that works across different countries, especially around Europe and Asia, without having to buy a new plan for every trip. I’ll mainly need it for emails, maps, messages, and the occasional work call. I’ve been comparing a few providers, including holafly's unlimited data plan, and I’m trying to work out whether this deal is worth the extra cost. For those who travel regularly between countries, any tips on esim that is reliable? I’m mostly interested in coverage and whether it’s practical to use the same provider in different places. Thank you.