i have used those things a couple of times. the shingle are so pricey that the homeowner wanted to expose as much as possible to cover square footage but effectively nulled their siding capabilities. so we backed the building with bituthene. they say that if you install the bark with about half or less exposure then they are a fine product but they want to crack (a lot) and that makes me wary. they are very similarly installed to cedar shingle. they are two foot in length. i think that they are a nice accent but too much really is too much.