I agree with richlocks.
8 years ago I tried Lewenberg's stuff for almost 3 years and wasn't happy with the results for the price I was paying. whenever I would mention something about it to him he would interupt me with oh you need to use more. I was already using 10-15 sprays 4X/Day which was a PITA to do.
with those before and after picture albums he had on the waiting room table made it pretty convincing that it worked.
then when finasteride came out he would constantly mail, hand out and post all over his office the DANGERS of using finasteride with minoxidil and how INEFFECTIVE it was and also to stick to his formula because it's the best thing out there!
So I waited for 1 year after propecia came out to see what people's results would be before switching over to it. since I made the switch I've had great results just using propecia and minoxidil (rogaine) alone. It was cosmetically acceptable unlike when I used Lewenbergs stuff. granted if you added finasteride to his regime, which he was highly against, may have yeilded similar results I think but for me it all comes down to what you're paying for it.
I just didn't like his overall doctor ethics (it was more like business ethics for him). he just wasn't open minded at all and way too greedy in my opinion which is why he pushed his products to use it more and more and more and...
2 more things:
I ended up buying his stuff for half the price for about 2 years from one of the receptionists, we would meet around the corner and make the switch..lol
and when I first went to the office there was a camara that needed to get a face shot of you before they buzzed you in and I asked why later, they told me because they were getting bomb threats (gee I wonder why).
anyway that was my experience with Lewenberg's stuff and good luck to all those that use it.