Do NOT trust.
Not a reliable company. Be very careful when purchasing a sim card for EU roaming. I purchased a 10gb sim card from a merchant, asking twice to verify it would work with roaming throughout the EU. When I put it in, it did not work. Customer support was not contactable. From my online research, this appears to be the modus operandi of this company (scam on EU roaming & have no customer support).
I briefly considered upgrading to a bundle and just soaking another 2x the cost I had already paid, but upon downloading the app and investigating, they make you top up before buying a bundle, but unless you enter a secret "saver" mode by texting saver to 2525, it costs 2x as much. Also, in the fine print, it says that all bundles must be activated in the Netherlands within 2 weeks... This means if you're traveling, you would need to return to the Netherlands to activate it, which means abandoning your trip. Not at all impressed with this company. I am planning to simply accept a while longer before I can get a different SIM card, I fully intend to dispute this card transaction when I can, and I fully intend to report this company to the Dutch Consumer Protection agency at consuwijzer.nl