Works great and so easy to use!!!

Good as a basic reference

Best GPS I've used!!!

I have one of these calculators at work I paid 45 bucks on sale and use it everyday to figure volumes and conversions I love the fact that for 5 bucks I can have that on me at all times just in case I misplace the calculator and it works great for home use as well. The only thing it doesn't do is rotate but hey It does everything else perfectly.