Its anything from not being able to log in, to not being able to get access to certain parts of the site, or littered with "try again later" messages.
Im so pee'd off. How can a company of this size have a website thats so poor.
In the last 3 months, ive probably used the site about 15 times, of which id guess 10 of those visits have resulted in 'site problem' messages.
What a joke.