Haven't played WD1 yet, but I started on the Mad Max game a week ago. I gotta say, I'm having fun with it!
It took a few hours to get into, but this is clearly one of those games where the more you play and get familiar with it, the better it becomes. I haven't done too many of the main quests yet, as I love driving around collecting scraps to upgrade my car and the strongholds.
The graphics are also pretty decent (at least the effects, such as fire, weather, etc), and the combat system is good.