The V-train 2.0 has thin soles. On the jagged Great Highway San Francisco bike path, it is not comfortable because the asphalt is somewhat chewed up. However it is fine on the smooth Great Highway car road which has been closed off for hikers and runners since the beginning of the pandemic.
These shoes will not work well on rocky trails. Too bad they can't make a model with thicker soles for rocky trails like at Mt. Tam.
The baby toe especially on my right foot is hard to get into. I have noticed that the length of people's baby toes can vary a lot.
Vibram's main old competitor Fila Skeletoes had only four toes, the last two in one pocket. Now i know why. They figured out that it would be easier to get on and it was somewhat more comfortable on those last two toes. --
The Skeletoes had a thicker sole model as well. I thought they were great shoes and one third the price of Vibrams. But Vibram sued Fila for they say patent infringement but the truth is it was actually because Vibram wanted a monopoly on the toe shoes so they could keep their price three times higher. The court documents were kept a secret probably because Vibram paid them to get out of their market. That is all speculation of course but that is what it appears to be.