These three mascaras are great for different eyelash looks and they are worth trying. I have used them and loved them. It depends on your personal choice,which lash looks you want to achieve.
Benefit They are Real Mascara (20$-42$): Water proof, long lasting perfect for dramatic, long and thick eyelashes.
Rimmel Wonder'full Volume Colourist Mascara (18.95$): Great for natural looking dark lashes, suitable for every day look. It claims to darken the eyelash colour with regular use.
Maybelline Lash Sensational Mascara(21.95$): Non water proof, very easy to remove, best for long curled eyelash looks.
These three mascara are for three different purposes, they can not replace each other. Have you tried any of them?