I have the same car and I love it. I have three Bimmers - 94 318i, 2002 330xi, and a 97 528i. Of the three, the 528i is my personal favourite. Most bugs should be out of the car by now, with some well known issues - but not that big a deal -listed somewhere in one of the many forums here.
My one recommendation that I think you will enjoy is to get your software Dinan'd. Some BMW dealers are authorized Dinan dealers as well. For some reason my Bimmer wouldn't take the Conforti shark, after trying many many times. It was sent back to Turner and they couldn't figure it out either. The shark absorbed all the car data, but wouldn't download, so I Dinan'd it instead.
What surprised me was the performance at the lower end of the RPM's when the car is just starting out. The Dinan'd software also remaps your transmission and this is noticeable from the first moment you hit the accelerator when you pick your car up with the new software. I was burning premium gas (92 in Canada) and if you Dinan your car, you will need to burn 91 at least. I thought if I'm burning premium gas I might as well have the software set up to take advantage of it.
Sharking your car is when you download new software into the car; chipping your car is when you replace the chip with another performance one. The 97 528i needs to be sharked. Oh yes, you will feel the extra horse power added as well.
In reviews of this car, back in 97 - you can find them on the net - you will find the 97 528i to be considered the finest luxury sports sedan available in the world. So don't sweat the small stuff (known issues).