I built mine as a very basic controller, without the voice ID. That can be added later, if I decide I want it. But it works perfectly for what it is. It was also delivered quickly, all the parts were there, documentation was thorough and it went together without difficulty. It was also easy to program.
Most GMRS repeaters that I have heard don't even have ID nor an EOT indicator. Some don't even have a squelch tail. It can be hard to tell if you are even getting into the repeater, or if a listed repeater even actually exists in real life. I have mine programmed to ID (in Morse code) after the first transmission and (if and as long as there are subsequent transmissions) every 15 minutes until the activity is over. I also have it set to beacon every hour. This is to announce its presence to GMRS operators who might be traveling through the area. Another advantage of the beacon mode is it allows me to listen for it when I am out and about, as an aid in gauging its coverage.
The ID-O-Matic adds these features to my repeater, and makes interconnection between the receiver and transmitter used in the repeater, for less than $50 shipped. Sure you can get a controller with more features. They start at about $200 and go up rapidly. $300+ is more common for controllers that have more features than the ID-O-Matic offers.
But the radios I'm using as receiver and transmitter have PL built in, so I don't need that built into the controller. My repeater is easy for me to access, so I don't need to be able to control it remotely. Nor do I have any need nor desire to have a computer powered up and connected to it 24/7.
This little controller does everything I need it to do, and does it at a price that is not much more than those Chinese controller boxes that connect a pair of BF-888s or whatever and use VOX to control the transmit. And it's a much more serious controller than those. It's not a fair comparison to pick it apart based on the features found in a $300+ controller.
So that's my review. I give it thumbs up, and I'll probably buy at least one more of them.