it's certainly true to say that there are a lot of watchmakers out there who consider Timex's own published service procedures to be inadequate, and the design philosophy and build quality of their watches to be contemptibly inferior. This is something that I have never understood; it's almost as though there is amongst watchmakers a culture of bias against the brand, dare I say it, an element of snobbery.
It's also quite correct that Timex's service procedures would be wholly inappropriate for a fully jewelled movement, in much the same way that the service requirements for a Ferrari differ from those of Ford, but if your garage tried to tell you that they need to service your Ford in accordance with the Ferrari service procedures (and that they should charge you accordingly), because the published Ford procedures are inadequate you would quite rightly question their rationale and take your custom else where.
I can only speak from my own experience and that includes quite a lot of Timex watches. There are definitely some aspects of Timex design that I dislike, just as there are design aspects of many other Swiss, American, Russian, and English watches that irritate me, however, I don't think that their durability can be questioned. What is more, from experience I can happily say that the vast majority of apparently dead, 50 years old and never been serviced and look like they've spent most of their life in a war zone Timex's that I have then given the Timex spa treatment, have straight away sprung back into life and gone on to perform as designed. If that isn't evidence of an effective service procedure then I'm not sure what is. And as I said before, I have never encountered a broken Timex balance staff.
Obviously other people have different experiences and accordingly (and quite rightly) will have arrived at their own opinions. What I find so difficult to accept, let alone understand, is the (so often repeated) assertion Timex watches were never intended to be repaired or serviced. The fact that Timex went to the trouble and expense of publishing service manuals and tech sheets, and providing a supply of spare parts is proof positive that they were meant to be serviced. And my own experience with them has demonstrated to me that the published service procedures are not only perfectly effective, but also incredibly simple to carry out.