Picking an e-caller is a choice between which negatives you want to buy along with the features you want to use.
If buying new and didn’t have contacts in the business, I’d likely hold my nose and buy a CS24. In my case I’d talk with Minaska and likely go with them if I upgrade any time soon.
Like Erich, I’ve had a Minaska M-1 for 8 years or so, still like the features, and like the modular options to upsize the e-caller to fit the terrain of a calling stand on the spot. Minaska has never let me down though their business and marketing reputation is abysmal. It’s the only e-caller I’ve used (of half a dozen) that has never produced the wrong sound when I hit the remote play button. I upgraded internal electronics once but have never sent it back for repairs.