Chassis Film is way better than those cruddy undertrays that make a terrible slapping sound. The film is quite thick and holds up very well as long as you apply it to a completely clean (motor spray / de-greaser) chassis, and have all under chassis screws mounted well.
And I really welcome the VTS / Triad style slipper. I found the stock 44.1 slipper to have very little "sweet spot" adjustment room.
This is a really great looking kit, and I highly look forward to driving a 44 with the BB shocks!