Looking for top 3 features / characteristics of a Plasma Etcher

Hello Technical Professionals. I am looking to do a top 3 features project for plasma etchers in the working world. I am looking for folks who use a plasma etcher for etching or cleaning in their jobs or student research. Please reply with your top 3 features and your email address if you would like to be featured.

For this survey I am looking for small bench top etchers such as the PlasmaEtch PE-25. http://www.plasmaetch.com/pe-25-plasma-cleaner.php

Thanks!

Scott