I have had the same Bel RX65 for nearly a decade now. I normally would get a new one every three years.
This one is just too damn good, too damn accurate.
'98 Dinan/RMS stage 2+(VAC cams, CES Cutring etc)
'11 Saab 9-3 XWD tuned(wife)
'06 Saab 9-5 Combi 5mt tuned(Aero interior/Konis etc)