The model-driven software development (MDSD) vision has booked significant advances in the past decades. MDSD was said to be very promising in tackling the “wicked” problems of software engineering in general. However, a decade later MDSD is still far from becoming widely recognized within the mainstream software development. At the same time Agile software development methodologies are widely considered as the way to go. This is counter-intuitive as MDSD seems to be the right methodology to boost Agile approaches. From Agile software development perspective, design models are a waste. In this experience report, we present Prototizer, a tool based on modeldriven software engineering that could boost the Agile vision. We present a validation of Prototizer on a recent case study and discuss the main lessons learned throughout the past years.