Me personally I love the beauty blender. I use it with my bb cream from Jane Iredale. I find by using this I loss less of my product and gives an even non streaky finish. I can not apply make up with my fingers I think it is because been a make up artist brushes are something I was trained with and they are embedded on my brain!!
This is defiantly a love or hate product but I truely love it, its about $20 dollars with tax but it is well worth it as it lasts forever (normally I only need to buy a new one when my daughter runs off with mine and paints with it!!)
Its very easy to use, wet it with warm water and squeeze the excess out and wham bam thank you mam its already to use (sometimes I will spray my hydrating toner or Jane Iredale hydrating sprints onto it if I feel my skin is dehydrated).. With it been egg shaped its great to do bigger areas of the face faster with the fatter side and then when needed in smaller areas like around the eyes you can then use the smaller pointer part allowing you to get more precise with your foundation or even concealer..
I normally get it in sephora. But you can always buy it online at http://www.beautyblender.net or else on amazon http://www.amazon.com/Beautyblender.