I would agree that you can enjoyyour shoes with the leather sole for around 10-15 times before you topy and it would be fine. As for the rest of Fritzl's comments - he has yet to provide a legitimate reason as to why you shouldn't topy... I've found that practically topys have: a. Enhance my traction on all sorts of surfaces, which include marble, tiles, smooth concrete, pavement etc which i encounter everyday b. prolongues the life of your shoe as it wears down slower than leather c. dries much quicker in the rain than a leather sole d. more cost effective than a full resole. a topy does not inhibit your ability to resole the shoe eventually e. causes no structural damage. f. does not feel significantly different - personally i don't find it that noticeable g aesthetically it is not too noticeable either. h. i get peace of mind that i do not have to worry about the weather when i select my nice and pristine dress shoes. i just wear what i feel like! I also apply a toe tap which significantly reduces wear on the toe which significantly enhances the look of the shoe when worn.