Just did Tray Mountain +1 workout today which is a 3x25min SS. This was spot on of what I could handle. However I was wondering much about the rating if it should be “very hard” or “hard”. I could maybe add 3-4 min to each interval, however I’m really not sure I could have survived another set with 25 min. So hence the last it should be ranked “very hard” according to What are Post Workout Surveys? – TrainerRoad ?
Very hard seems appropriate based on your description 
I boil it down: “Could I have finished one more complete set or interval in the same format, with the same rest duration as the previous efforts?” If yes, it’s Hard, if no, it’s Very Hard.
Yeah thanks. Also my conclusion 
However 25 min more is like 25% more of the workout so that though might not fit every workout? But yeah, Very Hard it is. Atleast the legs said that near the end
Wow, that cadence. Are you a robot?
Same wattage. Long and boring 