Well, you have certainly come to the right place for information on the Bonneville
As a current owner of a 1993 SSEi and a 2003 SSEi, I can tell you that they are excelent cars
They do, of course, have their flaws as do all cars if you really research them. Here is a link that was started awhile ago about common problems on the 2000 + style Bonnevilles. Keep in mind that not ALL of these are really "common", and have only happend to a couple cars here, but they can happen. Also, it IS 5 pages, but MANY of the problems are just repeats
Honestly, if you do your research on the car you want to buy, and know its background, I don't think you will be dissapointed, and you will LOVE the power on the SSEi..... very surprising to some unsuspecting "sports" cars when a four door grandma car gets them
Take some time and check out the Techinfo link at the top of the page, there is alot of information in there on all years of the front wheel drive Bonnevilles.
Don't let that link above scare you away from these cars, they are truly good cars and very underestimated. Plus like all cars, maintenance is key.