Enhancement request: Add units to all results columns, whether hours, days, years, etc.
Enhancement request: Change formatting to make large numbers easier to read. One of my MTTDL results was "4120458233786.7". I'd like to see this as "4,120,458,233,787" for better readability - commas added and the result rounded. Even better, change the units depending on the size of the result. One MTTDL results might be labeled "104 Years" while another might be "123 Days".
Enhancement request: Add text explaining the lower paragraph. I interpreted the values to be the percentage chance of some type of failure after the passing of the number of years in the heading.
Enhancement request: Add a little bit of information about the underlying calcuations and then add a disclaimer about how the results can be used to compare different RAID models but will not accurately measure expected system lifetimes.