I have 14" hair system. Takes me about 1 hour or so to detach, clean and re-attach. If I have another system ready I can get 'er done in 30 minutes or so. I use Supertape on both sides and the back and a tiny bit of Walker Ultrahold on the front hair line. Clean up is easy for me since I do this once weekly. I used to go a month between cleanings and clean up was hell because the tape had broken down and melted into my all lace base.
The products I use for this procedure: Dawn dishwashing liquid, 91% alcohol, Adjust-a-Bond, Supertape and Walker Ultrahold.