I operated a 690B for many years.
The good: FUN to fly. Very sporty. Fast. Good short field action. Easy in/out with entry door low to ground. Rugged. Pax like the picture windows. Did I say fun?
The not-as-good: Avionics likely to find installed will be ancient. Loud prop noise inside and very loud engine noise outside on ramp. TPE-331 and NTS can be fussy and tricky to rig properly...you will need a good mechanic. Cabin space OK but PC-12 much better. If you pride yourself on smooth landings she will humble you.
Sort of like an old car? Take care of her and she will provide loads of fun.