It sounds easy, one can purchase multiple vignettes but isn’t fast
I was looking for a service that could help me purchase several vignettes for my trip, and I decided to try this one. It covers only a limited number of countries. It’s slow with activating vignettes and can leave one in a difficult situation if you rely on it. If you try the service, make sure to purchase your vignettes at least 3-4 days in advance. Yes, it really took 3-4 days for them to activate some vignettes, which was disappointing.
