MS is great. Take your time with your first one, but don't take a break. Once you've started it everything flows together so easily, unless you stop for a couple days then try to get back at it. In total it will take anywhere from 8-10 hours to complete the ECU assembly. Try and make a day of it, say devote a whole Saturday just to the ECU. If you take a break and come back to it, you'll feel a bit lost as you cram sooooo much new and exciting info in all at once coming back will be like meeting 100 people all at once then trying to remember everyone's name next week. Good luck!