Personally and after about 5yrs. of regular use, I find the WA tab. site about as good as it gets for sp odds [they are done mechanically from a data-base program, not by the office boy] which isn't really saying a lot I guess.

I kept records for over a year [had to copy them before the 1st. races as they disappear after a race is run], but lost them in a OS crash. I haven't bothered collecting them again since then, but I did do a lot of comparing their odds with the Sat. Age and Herald-Sun for Sat. metro meetings. I also back things up regularly to another HD now!