As for the "cheap" MLCS bit I'm open to other suggestions.
First I apologize for a poor choice of words. I cringed re-reading my post
. "Inexpensive" or "lower-end" would probably have been more appropriate.
Second, if Carol says the 690 will do the job, I'd take that to the bank.
My luck with MLCS in the past has been about 50:50. Some bits do OK and some arrive unusable. I've given up on them pretty much so factor that in when assessing my opinion
. I try to get the best cutters I can but, if you are only doing a few doors, an expensive bit may or may not make sense. I hope it goes without saying that 1/4" shafts are out. MLCS #8694 is about $28 and a Freud 99-513 Quadra-cut is about $71 but, there are a pack in the middle. A Whiteside is around $55 however, I guess I shouldn't throw prices out there without knowing if you are looking at a rail/stile/panel set or what.
ll that apologizing aside, your speed control and light passes will serve you well. My concern on the budget bits was that after a few doors, your cut quality may start to suffer. The choice here will depend on how much work you need to get out of the cutters. If they are an expense rolled into the project and the quantity of work is not large, I would go "less expensive". If the quantity of work or the level of expectation is high, I would buy better.
Bargain bits are great for trying profiles you are not sure if you will use much or for those known one-off jobs. Products that have disappointed me would include the usual bargain bits with the exception of an occasional Rockler or Woodcraft bit lasting much longer than expected. As an example, I have worn out a Rockler and Woodcraft drawer-lock bit while a Whiteside bought around the same time and used even more still provides a better cut than the others did new. As a contrast I have one Woodcraft flush bit that has outlasted all his brothers(???) Other folks have different experiences; you probably will as well