I got one of these jewels a month ago or so. I practice on-air, because I am yet to buy a second switch to put one back to my dummy load and just because in the 30m band no one hears me. Would be great, to have regular QSO with a buddy, propagation allowing, due to my very narrow directional antenna, between buildings. Most importantly, I am glad my sending will never ever sound the same as a keyer's, which I have not, OOK-Ersatz electronic commanded sending. The KN4YB doesn't need much to be out of rythm, part of the fun, to get it right in a second, but you'd like to have a straight key at hand. Just like a violin that de-tunes with a slight hygrometric variation, adjusting pegs should take 5 or 10s. Or just like a tubes amplifier or transceiver. Just like anything, actually, otherwise, I'd buy frozen food, heat it in a microwave oven.