I had to use customer service as my "advance button" wouldn't work (it happens) and they were phenomenal!  I did test the feeder to see how well it would keep wet food cold and it did a pretty good job.  I would suggest you 1) fill the ice packs with water and a touch of rubbing alcohol and freeze them well in advance.  The rubbing alcohol SHOULD give the ice packs a bit of extra "cooling" life, 2) put paper towels (or the like) under the ice packs when placing in the feeder; as condensation will form 3) mark the feeder slots, so you know which one is to be used when you are setting the feeder timer/turning it on and which one will be the 1st feeding (which the feeder will open to IMMEDIATELY after turning the feeder on).  4) fill the latter feeder slots with wet food, add some water and freeze, those in order to ensure they will still be cool, but not frozen when it's their time to open.  5) ENSURE to test the feeder with your pet WELL in advance of when it will be needed with you not there.  There are a few Cons: 1) the timer can only be set in 6, 12 or 24hr intervals and as soon as you set the time the feeder "opens" to the 1st slot and starts the timer clock.  This can be an issue if let's say you need to leave for the airport at 4am and your pet normally eats at 7am (and 7pm).  Basically you would have to have to set the feeder on the 12hr interval, to open at 4am/4pm as there is no timer delay (AGAIN as soon as you turn on the feeder the 1st meal portion is opened.  2) the ice packs top is a push down top and should be a screw top as getting them off can be difficult.  I found getting them on is easy IF you fill the packs, put the top on, use the under side of my kitchen counter and push up to close it.  3) My pet hasn't done this but others have commented that their pet has figured out how to move the top of the feeder to get to the other portions, before the timer moved it (plus some have mentioned the pet has even moved the entire feeder, probably when trying to get to the food).  4) the flip top to the timer don't lock or snap shut, but I haven't found this an issue (and if I do I will just put on a piece of tape or the like before setting the feeder. 5) The instructions were printed very small, so I went on line and printed our a larger version from there - plus the instructions are so-so, as it wasn't clear how to access the ice trays - FYI - remove the timer housing, remove the white cover, then separate the feeding portion tray from the bottom (there is a line) and presto you found the ice trays.