Personally speaking, I wouldn't rely too heavily on the Turbo, for training purposes, it's fine to use it for supplimentary training, but the majority of the training would be best done on actual roads. There's an effect called 'tissue jiggle' which isn't as much of an issue on shorter rides, but can be much more of a problem on distance rides, it's hard to replicate that on a turbo, and conditioning out the tissue jiggle, by riding on real roads, can be beneficial, more regarding recovery, than the actual ride. There are numerous other subtleties of road training as well, that you can't easily replicate on a turbo, that add up to bigger effects, the longer the ride becomes (unplanned / unforeseen variable wind / weather conditions/ variability of surfaces / unplanned stop starts / unplanned hill starts ) to name but a few.