rock solid in every way... my dad has 65k miles (90% city stop and go driving) on his 99 tahoe, and NOTHIN has gone wrong with it, and i am not exaggerating, the only time it has been in the shop is for oil changes and scheduled maintenance... and, if you decide to get one (specifically the 5300), and dont have experience with big engine RWD vehicles, go easy on the gas... those engines are extremely powerful, and will powerslide around any turn you want, DRY... a lot of people think since its big, you cant get the back end around, but let me tell you, its possible, so BE CAREFUL!
few other things... the interior is about average... its all plastic on the dash, so nothin special there, but the seats are awesome... sit in those leather lumbar babies with the heat jacked up in the winter and you will fall in love...