What kind of cleaning services provided by cleaning companies?

Also share your experience with these cleaning companies.

For 10 years I worked for a company that cleaned everything. About 15 -20 employees. Windows, carpets, upholstery, tile and grout, offices, homes, pressure washing, gutter cleaning, vinyl flooring strip and wax, high dusting, commercial kitchens, C.C.U. You name it, we cleaned it. The owner was a friend of mine so he made me a supervisor and I learned about cleaning from the folks I supervised. Now working for myself the last 14 years I just clean windows cause all that other stuff sucked.