Mason Bee houses...worth it??

[gssgarden]

I moved back in April to a relatively new neighborhood so there isn't many trees, bushes, or established flower beds to attract bees. I noticed that I didn't have many bees on any of my plants last year. I'm only growing about 18 this year.

Has anyone had experience using the Mason Bee house? Did it work? Did it attract the bees? Did you need to buy the bee cocoons?

Thanks in advance,

Greg