I do not think you will be disappointed AT ALL by Hello Lashes.
I usually just by cheaper mascara, not feeling like I needed anything fancy. But once I got the opportunity to try this, I think I'll have a hard time going back.
There was a noticeable difference in the length and volume of my lashes. I always have issues getting the corners of my eyes, but the brush shape was quite helpful in reaching (though it was a bit scratchy on the sensitive inner corners of my eyes)
I would say the mascara is definitely worth the price (and I'm cheap).