I found their "Low Boy Paddle" to be of poor but satisfactory quality. I was initially put off because the key which requires assembly didn't have the correct parts but to the company's credit, they promptly supplied the missing parts from a list I emailed them.
I found the use of using the tops of machine screws as key contacts to be troublesome but they worked adequately but not pleasantly, but I time I got used to the clunky feel.
I had a friend, Fowler "Barney" Norris, W3MTE (FN), a former CIA Morse Operator, who was an excellent radiotelegrapher who worked for Tropical Radio Telegraph (TRT) at Slidell, Louisiana Radio, WNU and he was both fast and accurate. He used a homemade kit from two J38 keys mounted next to each other. All his motions were up and down, using minimum finger motions. TRT had the highest standards for Morse operators, minimum perfect copy requirements for five minutes without error was 35 WPM.
The key was usable but disappointing in quality.
73
DR
N1EA