The M2 like the M1 or F1 is an excellent unit for someone willing to train & practice with it. For a trained searcher it should have a faster find time than any 2 or 3 antenna beacon for the simple reason it does not need to take the time to process the incoming information like the Pieps DSP, tracker, or similar beacon. It is easy for an excited searcher to outrun a 2 or 3 antenna beacon. That being said for someone not willing to practice with the beacon go with a tracker, Pieps DSP or similar type with the tracker being the easiest to use for a non-practicing beginner. Fast successful multiburial scenarios with the M1, M2 or F1 require lots of practice and excluding guides, ski patrol, & SAR folks I doubt most people would get enough practice to pull them off with success. Here again the Tracker & Pieps DSP would proform better for a person not trained and in not practicing often.

I am not @Michael but I can tell you the M2 is outdated because it does not use a full digital antenna. The DSP is much better because of the features it has multiburial, flagging, frequency check, ect. The Pieps also has a fourth antenna that check the emitting frequency every time you turn it on. 130 dollars isnt much more to spend if it could save time in your or a friends burial.