I'm old and lazy. Had a 10X12 barnstyle TuffShed barnstyle installed in the backyard last summer on top of a compacted level crushed rock slab. Also had a 220 electrical panel split into two 110 circuits installed.
The Tuffsheds from the mfg have upgraded features compared to the Tuffsheds sold at the big box stores, and are assembled by Tuffshed on site (took one day)...which was critical because there's no way to get a pre-assembled shed into our backyard. Pricey, but I don't feel like doing a big project these days.
The pieces came pre-painted with premium Glidden paint, and were painted with another coat on site after assembly. The shingles were GAF premium quality, and just happened to match the GAF architectural roof on our house.
It's a very sturdy wooden shed, 16" centered 2x4 studs, with a galvanized steel base and an aluminized interior coating that does a remarkably good job of keeping it cooler in the summer and easy to warm up when I want to use it in the winter.
The workbenches, shelves and tools all have wheels so it's easy to move stuff around, and the two 110 circuits let me have heat while running tools. I don't like to do extensive wood cutting inside the shed with table or chop saws because of sawdust, but it's simple to move them outside for that stuff.
TuffShed often has 'sample' models available for sale at considerable discounts at their regional fabrication plants if you have a building site they can deliver the fully assembled shed.
I have to say that TuffShed has a finely honed selection and delivery process...kept us continually in the loop, and did EXACTLY what they promised to do....which in my experience is fairly unusual in the contractor world.
If you buy or have a shed built/delivered be sure to spend some time on the internet learning about the intricacies of shed foundations. An inept foundation can quickly ruin a well-constructed shed.
As previously mentioned, make sure you check out your local building codes for required setbacks, and dimensions that trigger inspection permits. I had the shed's underground electrical service installed by a licensed contractor and inspected.
I'm always a bit amazed by the number of sheds I see built right against fences, which is generally an obvious code violation and makes maintenance difficult.