I can get some two-hour HBOT sessions (2 bar, pure oxygen) in Slovakia (a 2-hour train ride from here) at EUR 70 a piece ($87). I wonder—how will this compare to 1hr sessions at 1.5 bar (mentioned in the studies I found)? Will 10 such sessions compare approximately to 20 one-hour sessions at 1.5 bar? Is the higher pressure beneficial for PCS or detrimental?

Has anyone given these a try? Am I likely to feel any improvement after 10 such sessions? (I can buy no less than 10 at a time so I thought I could buy ten in two weeks and then possibly repeat it if I see any improvement).