I've got one:
Roadsters (US) is listed as not working according to the rdb that comes with PJ64 1.5, however it starts and runs, just very poorly. Graphics errors listed in the rom browser are present, as well as one that isn't: wheels aren't visible. Both the PAL (E) and NTSC (U) version exhibit these symptoms. The PAL version runs somewhat better, but not nearly as well as on a real N64. The sound is much better with the PAL verison though.
Wipeout 64 works fine for me. Mine's the U.S. version. I don't know if it's "good" or not, I don't mess with that verification stuff. I dumped my own roms, so there's really never any question except for the odd foreign rom I downloaded.