hi bella & welcome to Auctiva!
to make the transition a little easier have a look at some of the tutorials:
http://www.auctiva.com/help/tutorials.aspx
as someone who pays for the extensive sellathon tracking info i would recommend it. it's great for analyzing best times to schedule listings, key words and more. i feel the small fee has helped to increase sales. of course the benefits are really down to how each person makes use of it.