Dunno about the Chiller but Ive got a small & medium Mad Fish & they're awesome! Worth the coin for sure. They just need a size in between small & medium...

Shorecatch sells them too

 Ive got the medium chiller for the yak and it does the job well, need extra ice blocks through summer coz its in direct sun all the time and its not as well insulated as the mad fish but still gets the job done.

 Really needs a size between large and medium, IMO. But it will certainly take a 50lb wahoo with no problems. Very rugged, nil damage to it yet after some extended use. As for maximum ice-keeping capabilities, I think it would be pretty good. We previously took a large esky to Ningaloo each year,(winter) filled with home-made blocks that fitted exactly to allow us to keep ice for 2 weeks, then having to do a trip to Exmouth to fill up again. We now use the large madfish, and charge it every day with frozen milk bottles. We have 2 sets, put a fresh set in every morning out of the freezer so the solar can freeze the others while we are out fishing. At the end of each days fishing, fish are removed for cleaning, bag and milk bottles  are given  a quick was and closed up again. Bag is still cool in the morning , not smelly, for the freshly frozen bottles to go in and process is repeated. Works for us, keeps fish cold enough for good quality. This may not work for the freezer fillers, we only work on killing a max of couple of fish a day, otherwise, apart from any other considerations, you could easily exceed your possession limit in just a day.  

When I have used it at home, in summer, a bag of ice slurry chills the mackerel down well and lasts all day. Mine has now done 2 month-long Ningaloo stints, plus use at home, and still looks like new.

I have thevlarge and medium Madfish. Awesome. The medium is perfect for most occasions, the large gets a gernsey for deep drop or Exmouth. Have filled it to the brim a few times

 i have both.

both in large size.

sadly not tested or used in anger.

im thinking of selling the reliable large bag.

keep an eye out in the for sale forum.

i reckon that madfish is worth the extra.

cheers

 Thanks very much for the feedback fellas. I was leaning towards the Chiller bags mainly due to the better range of sizes but I may have a look at the Madfishes

 Hey guys, Anywhere in Perth that sell Chiller bags?

The boat and tackle store at Hilarys marina had them when I was in there about 6 months ago.

 All good, cheers guys. Got a madfish from Bluewater TW Joondalup. 20% off sale made it a bargain