These shingles are lightweight and easy to handle. Installers having been using this style of shingle for decades so finding a qualified installer should not be a problem. Most contractors will simply cut off the "tab" portion of the shingle and use the remainder for the starter strip which the first course of shingles lays down to. Also, you can cut the shingles in thirds to use as your cap shingles at the peek of the roof.
Longevity is lacking due to their lighter weight and design. Wind uplift warranty on these shingles is only 60mph and 5 Years which is less than half the warranty offered on many dimensional shingles. Quickly becoming obsolete as architectural shingles are dominating the market at a very competitive price point.