The exterior and interior look of the Cadillac XLR "turns heads" everywhere you go. Its power and handling feel like a race car. No car make compares with the comfort of Cadillac and the interior seats, by comparison to all other two door sports cars, is unparallelled. Its strong standard features do not make you want to do add ons. This is an exceptional car - GM did this right.
Driving comfort, hanlding and physical appearrance.
None really. I suppose they could insert a V12 engine or increase the trunk space. But the V8 power is sufficient and you do not buy this car for trunk space.