I got the 490 mm as well. I've got a 130 cm 16% stem on it or something - my surly's top tube's a bit (quite) too short for me. I've got 2 road bikes, so I already have 2 bikes with drops that I can ride more aggressively - basically I wanted a more comfortable riding position on the surly, but still wanted to be upright because it is my commuter bike or my riding a gravel towpath or something like that bike.

I may eventually try flipping them over, but we're trying this for now. I initially put them on the bike flipped like Sarah did, and got on the trainer a few times and just didn't like the position.