Well I did not think my vampire was anytthing close to "stable" but then I haven't even bothered to boot it since 1 year.. but I haveheard of others having "strange issues" but going back to 020 or 030 again (their old turbocard) everything was stable again.
so it seems to be what software you actuallty use in your amiga.
(OK yes. over 1 year. much have happend so I guess it would be somewhat more stable if I upradedmine and tested again)