I have been looking at probes, planning to one day get one. I have decided against this probe. Not because it is bad. Indeed, everything I have heard about this probe's ability is great! The reason I have decided against this one is I plan on one day getting a different detector, which would mean putting down more money on another probe, since they are unit specific.
If you are like me and plan on one day moving up from your ACE, then think about this fact, and get a probe that isn't specific to your detector! If you plan on getting one for each detector, and don't mind that extra expense, then the sun ray does indeed seem like a great tool!