I use both of those products.I really like the microdermabrasion--my skin feels so smooth after I use it! However, I've never used another brand, so I'm not sure how it compares to some less expensive ones.
I also use both the day and night solutions. The night solution feels wonderful after I use the microdermabrasion. I like the day solution, as it helps my moisturizer (also MaryKay) go on smoother.
I'd give them a try. If I'm not mistaken, you can get your $$ back if you're not satisfied with the product.
Lisa