Yes, from my experience they are good. They have their pros adn cons though. To me liquid is a pain in the ass as you can't really carry it with you and take it as easily as a pill. I use insulin needles/syringes to dose them with, and doing it that way you have much more control on the amount of drug you take and can adjust or taper as needed. Some would say they don't work, as they think some of them need to bypass the stomach to work. If they do then they wont work, but they dont need to so your set.
I only use one's where I will only be taking it 1 or 2 times a day for convienence.