Holga Lens

So I dont know to much about these.. But I think they can give pictures a cool look.. at least from what I have seen

I recently saw some pictures taken with one and basically all I know is that they give the pictures a blurred or distorted look..

Almost like old pictures with light streaks..

Just curious if anyone uses them..

If so likes/dislikes

Are they common.. made for alot of newer cameras?

Thanks guys!