It was the first time my girlfriend and I rent a van and the whole experience was perfect from A to Z.
The Vanbox team was very helpful during the whole journey. They were flexible on the pick up and drop off time. The van itself was brand new, sparking clean and had all the necessary amenities. We spent 6 days in the Algarve (Southern/Southwestern Portugal region) and the van was very comfortable to sleep, chill, cook in and drive around. Its size made it easy to stroll through smaller cities and villages and park in pretty much any parking spot without being noticed.
I definitely recommend renting out a VanBox for your next trip around Portugal.