I also used both, the liquid is significantly more effective for me than the foam. I switch to the foam when I forget how ineffective it is and start reading people having success with it and its ease of use, and quick drying features, then I use it and remember how much it sucks at penetrating the scalp compared to the liquid and go back to the liquid mess. This has happened to me about 3 times in the past but now i've been more consistent, i'm not letting anyone convince me the foam is the same. If the foam works the same for you as the liquid, by all means use the foam. But just don't lie to yourself, or try convince yourself that it works the same just because you like it better and want to convince yourself that it's okay, cause it's cleaner and more convenient. Minoxidil liquid is that slutty girl that you like, she's better for you, honest, and more effective. Foam is that girl putting up a nice girl act but is a actually just a pretty little liar and isn't going to give you all the hair you can possibly get. You'll only end up hurting your own progress. So make sure you are actually telling the truth to yourself. Remember, you will also be helping others, because they will read your posts and, most people read 4-5 posts of people saying the same thing and will feel that it must be true then.