These are some of my favorite liquid lips. I use a moisturizer on my lips before hand just top give my lips a little added moisture because these do dry down quite well but I find them to be comfortable on the lips.
These are one of my favorite liquid lips. The other is ofra. I have super dry lips and these don't make me want to take it off. They also last a long time on me and look great. So no. You don't need a lip liner in my opinion :)