I had a rondomatic set up on my tank when I went on vacation for 2 weeks, and it was great. It dispensed everything properly and didnt fail.
I Highly recommend it.
Thanks for the recommendation - I was just looking for vacation feeders ...
I was looking at the eheim just for the name - it runs $90.
http://www.drsfostersmith.com/Product/Prod_Display.cfm?pcatid=16107&N=2004+112973
Theres also a rena for about $70 ...
I guess you get what you pay for - if you go cheap you can expect it to overfeed and break down, hopefully if you pay more you get more.