I don't think you
need to keep using MK - what really matters is what works for you and keeps your pocketbook happy, too!
Now to answer the MK skincare personal results question: Mine has been hit and miss, but mostly a hit. Without it, I always end up with acne, even with routine care.
MK Basic worked fine for me. Then I moved out of Mommy's pocketbook and couldn't afford to buy it on my own.
Finally tried MK again when I had more money, once again had good results. Then their new day/night formula came out (90's formula) and I ended up with adult acne again. Stopped using those right away but kept the skin care.
Stopped using MK when I ran out in 1996. We moved to the desert and I did not know how to find an MK consultant. I used something from the local day spa which was a bit drying but at least kept the acne at a minimum.
Then, one of my piano-student parents (a consultant) talked me into trying the new and improved TW, so I did, and friends complemented my skin within a few short days. I added the anti-aging day/night solutions after a few weeks. I have noticed my skin is less smooth when I cut back on my day/night usage, so I am sticking with it.
I like they eye products when I'm tired and have baggy eyes, but that's really the only time I use them. I really like that soothing blue gel the best, though it takes longer for my skin to absorb it. I think it gives me the same results for a smaller price.
Lip primer? Ha. Lip liner works best for me.
Eye primer? Double Ha. Makes my shadows oily and collect in the crease.
The TW bar and oily skin moisturizer are keeping my teen kids out of the dermatologists office. They had horrible nodule acne no matter what we used. Velocity doesn't cut it for them.
Have fun finding what works for you.
