Top Racing Crankshaft; Anyone Tried One?

HOTSHOT III

My 19000km 93 DTR was running well when I stripped it to replace the head gasket (although it's just started pressurising the radiator hence my taking the top end off yesterday).
Now considering a complete top/bottom end rebuild as winter is pretty much here so looking at options for crankshaft repair/replacement.
Has anyone had good/bad experiences with the Top Racing crankshafts? I have the option of Athena 125 or 170 top ends or reboring my stock cylinder to 1st oversize, possibly with some porting and other mods so would be interested to hear from anyone who's used the Top Racing crankshaft as supplied in any of these configurations.
Thanks guys!