I am new to Joomla! and this was my first extension. I'm using Joomla 1.5.2 and initially downloaded the wrong JEvents version (I neede version 1.4.3RC). I posted a question on the JEvents forum and received a quick and helpful answer. Once I got the right version, everything worked perfectly. It is very easy to use and will allow me to have my users enter in their own events.
I didn't like the default colors, but they were easy to change by editing the CSS file. The new version they are working on will have a choice of color schemes built in, which will be nice.
I recommend this product, even for a newbie like me.