I have had the 305. I moved to the 705 and then I bought a 500 as well. Mainly all as way's of demo'ing what is an important part of my business ...

So in general i switch back and forth between the 705 and the 500 quite often. Honestly I prefer the data recording on the 500 but MUCH prefer the stability of the 705. The 500 is a great little unit, perfectly positioned for the market, etc but it is definitely still a quirky little unit.