I built up my son's Roadini with Ritchey Beacon Comp bars (
https://www.amazon.com/photos/shared/Hdny6ViFROaPcQIM_FkEbg.aW9haXdpnlfOy4Dg9_oNzx), and I've had a few people test ride it. What impressed me about the bar was that despite purposefully not mentioning anything about the handlebars, everyone who's used the bike defaults to using the drops automatically. It's a great position, hybrid between regular drops and straight bars, and just to show how nice a bike the Roadini is, my wife used it on her commute a few days and now wants her own Roadini!
Like all Grant Petersen bikes, it's the kind of bike where the more you ride it the more you like it. I've noticed that about his designs since the Bridgestone RB-1. I still feel that the bike could use a lower BB (especially when shod with 38mm tires), but riding with 28mm tires makes the bike feel so agile.