Anyone ever used Calendar script called Calcium?

Hi all.

I’m using a very complete and intuitive event calendar on a portion of my site. ( which will redirect.) I’m presently in a 2 week trial period and after that I’ll probably temporarily host it on their server for a 3-month run. Does anyone have any experience with putting this calendar called Calcium on their own server/space? I’m looking for any problems like heavy-resource usage before I plunk down the money and then cant host it here. Its $95 for one calendar and $395 for unlimited calendars if installed on your own host. $20 a month for them to host up to 4 calendars on their server with a minimum committment of 3 months. is the url of the company.