Looks a very decent bike and spec definitely worth buying at the right price. Not much there for comfort though. I'd probably need to change the saddle for a sprung saddle although that might kill its speedy looks. Chromoly frames tend to last longer generally and that design certainly looks solid I think that is another bonus and may make it slightly more comfortable or at least dull the impact of going over potholes a bit more than aluminium. With secondhand you do need to be careful, look for cracks or issues in the frame (unlikely with chromoly) and judge how worn the components are. If they look worn and might need replacing sooner rather than later make sure you factor that into the price.