The layout is 29 feet long, 3 feet wide, except the end loops which are O48 curves.
Why Fastrack--because that is what I could get in Anchorage Alaska, and shipping track mail order is pricey. If it would have been available up here, I would have gone with Gargraves, but the fastback works flawlessly, and I have never had a derailment. The layout even handled a 7.9 earthquake last week without issue.
5 switches. I enjoy letting the trains run, so switching operations was not a priority to me. I throw the switches with the included Lionel switch controls.