I would take this further and say that nobody can really say whether they have "success" with these products yet as not enough time as gone by to accurately assess them. Glen's products haven't been around that long, and I don't think you have been using Bick4 all that long either. You can put acetone on your shoes where one would use a conditioner, but if you don't do it over a period of time, using the shoe, exposing it to the elements, it won't really show harmful in the short run.
Also, people confuse something as being harmful to shoes with something that is just not simply helpful. I'd say a large amount of products are split between these categories.
I agree...a lot of shoe care products contain harmful chemicals--heavy occlusive oils, solvents, etc.--in small enough amounts that no immediate damage is readily apparent. That doesn't mean it isn't happening...just that by the time the damage is done, selective amnesia will kick in and make the effects of wear, environmental insults, and the abuse of indifference, seem more immediate. And the subtle connection between proper maintenance, the health of the leather, as well as its ability to withstand the rigours of use will never be made.
Of course, that's one of the problems with posting to a forum such as this one...on one level or another exposure to objective information tends to ruin a person--once you are confronted with the facts, it's hard to comfortably retreat back into ignorance. That's not to say you can't close your mind to information that unsettles your world view--plenty of evidence for that right here on SF--but there'll always be that niggling "itch" somewhere deep in your subconscious...
Edited by DWFII - 6/19/14 at 7:32am