I've had good luck with Bosch rebuilds.  Did you get a 90 amp unit?  All
bets are off for anything else, but you usually get what you pay for.
If you paid much under $100 for your rebuild don't expect too long a
life.  Did you keep your old one?  If so, have it rebuilt locally by a
reputable shop for a spare.
--
Stuart MacMillan
Seattle

'84 Vanagon Westfalia w/2.1
'65 MGB (Daily driver since 1969)
'74 MGB GT (Restoring sloooowly)
'01 Toyota Tacoma (Something I don't have to fix!)

Personal mechanic for:
'70 MGB GT (Daughter's)

Assisting on Restoration (and spending OPM):
'72 MGB GT (Was daughter's, now son's)
'64 MGB (Son's)

Stripped and gone but their parts live on:
'68 MGB, '73 MGB, '67 MGB GT