Make no mistake, this extension is very powerful and well worth the money. The support is top notch. Not sure why you would get any other Event Management extension....or form management for that matter.
About the only thing I would like to see would be an easier filter to find events. Similar to a simple Joomla filter would be great....however....I am sure there is a rhyme or reason to the design they currently have.
Keep up the great work! I look forward to all of the upcoming updates whenever they are released.