Compu Tronix Distributorless Ignition?

Somewhat familiar with DIS4 for VW, many bad reviews from VW crowd.
Here are a few of the problems:
1. No vacuum advance capability.
2. Undefined mechanical advance curve. True electronic systems, have user defined curves.
3. Waste fire coils take space, and more plug cable length than stock.
4. One Year Warranty, failures are common, coil overheating problem, tach signal not working.