Come again? MS has time and again proven itself in both performance and reliability. 90% of the problems with MS are user error and even then instead of being stuck with a muddled heap of electronics you can't do anything with, the MS is completely rebuildable with full schematics online and great support sites. If you're buying pre-assembled then yes, you knock out 6-8 hours of time spent. The rest of the "difficulty" depends on how you want to install it. it took me 3-4 hours to install my MS-II using the universal harness from the site. I think the end result here is going to depend completely on personal preference. The two products are equally reliable and capable.