First impressions after driving some of my local roads I know well...
1. Very smooth, no really smoooooooooooooooooooth. Engine is smooth, transmission is smooth, power delivery is smooth and peppy and that's in comfort mode.
2. I don't know what people are talking about regarding the standard suspension and body roll this thing is flat in corners. I took it up a switch back corner hill and around a bunch of 90 degree corners where my truck would roll considerable and it was like a go-cart. Mind you I wasn't trying to drift the thing but at normal to sporty speeds its fine.
3. I miss my large digital speedometer from my truck...but not enough to drop $1,000 on that HUD.
4. Performance, again in comfort mode in HEAVY traffic from stop and go traffic to surging rush hour traffic to blazing down the freeway at 70mph its quite sporty. Quite good changing lanes, I would call it darty you can dart about with confidence, its planted, again no body roll. Engine is very responsive I'm not sure I'll need the MPPK it has plenty of power to change lanes left, speed up pass someone 'dart' back to the right lane with seemingly little effort. Remember I have been driving a 5.7 liter V8 with a 3.92 rear diff this X5 is fun to drive.