I considered the Bettamatic as well, but ended up not getting it because of a lot of mixed reviews (http://www.amazon.com/Zoo-Med-BettaM...rds=bettamatic
). The biggest problem, however, was that if it did feed 4-5 pellets a day, that would lead to a buildup of waste, which would require someone to do water changes if the vacation was long enough. And if you aren't gone long enough to require a water change, you probably can just leave the fish unfed in the first place. If you have someone capable of doing water changes for you during your vacation, I don't see the point of getting an automatic feeder (they can just stop by and feed). Again, the problem of "overfeeding" (not really overfeeding, but you get the point).