I came off propecia. I did have side effects though -- If you're not experiencing them I wouldn't worry about the scaremongering happening online although I must say it was pretty severe for me (although it was clear i was having sides from the first month).

If your hair is looking good with it don't feel that the scaremongering necessitates change, just thought i'd say that before I answered your question.

I noticed my hairloss beginning to catch up from the third week, where it became noticeable pretty much after the third month for me. My hair wasn't that great to begin with though, so the effect was more prominent.

My recommendation: If you're going to use a hair system, but want the option to return to propecia if it doesn't work out for you (if your hair is good enough) keep taking it.. otherwise take it up to the day you order.