I had tried a friend's Dynavap before but not aside from that. It is quite a unit for a first timer haha, I did a lot of research before deciding it was the one. I know it will last my fiancée and I a long time if we care for it, which was the most important thing to us.
Mine is going strong after 5 years, with one button repair I did myself. Loved it so much I bought my husband one for use in the basement so he doesn't have to schlep upstairs to mine every time he wants to fill a bag.