I've been using Arccos for a bit over a year and I'm very pleased with it, but I needed something to help me on the range so I picked up the Swing Caddie 200 a few weeks ago. The comparisons regarding distances between the two aren't "too" far apart, but I'm wondering which one is most reliable? Honestly, I could try and walk out on the range and laser back to the tee, but thought it would be more "entertaining" to see what my fellow THPers think.