Mine has gone around 10 years without a repair. As good as the Dewalt 735 is (does just what I need as it was purchased also), I wouldn't quite put it in the same category as a truck anyway. It would probably be too expensive to repair if something went wrong. Most likely it would make more sense to buy a new one, which is why the question about whether it makes sense to upgrade to the Shelix head is even being discussed.
Just saying . . .
Mine is about a month old but I didn't use it until about a week ago. I have yet to give it a serious test but already it appears the knives have been nicked. But I bought it because I knew I would one day upgrade to the Shelix. That day may be sooner than I expected.
“Travel is fatal to prejudice, bigotry, and narrow-mindedness..." - Mark Twain
If mine was new, given the availability of the Shelix head I would probably consider it also. It would be well worth it as I expect you would get 10 years out of the planer unless the Shelix head puts a much heavier strain on the motor. However, at about 10 years, the decision isn't clearcut anymore. When I bought mine, there really weren't as many alternatives as there are now.
Mine is maybe 8 years old, with fairly light use. Still on the original blades. Must have gotten it prior to that wave of bad blades a few years ago. If it goes bad, I will get another.
It replaced a floor model 15" Jet planer. I rarely get non dressed wood, and the Jet just wouldn't do final light cuts without leaving serrated lines on it from the rollers, so I sold it. The DeWalt is the right one for my use. I understand you can get some rubber rollers for the Jet, but I had never heard of that when I had it.
Rick Potter
DIY journeyman,
FWW wannabe.
AKA Village Idiot.