I tested mine for an afternoon and took it all over the place before I started trying to source one.  When I did I drove it 450 miles home and was surprised I could jump out without pain! 
  
I came from a lexus and it was much more practical etc but then I wanted to change into a sports car.  I think the storage is amazing for the type of car.  Can get two sets of golf clubs and all the gear in!  Magic. 
  
  
Solutions, also try a tonneau cover to stop stuff rolling about the boot.   
  
I'm 5' 9'' and a bit of a fat b**tard but I don't have a problem getting in and out etc.  I think it's technique! 
  
  
Buying a sports car is a buying into a lifestyle.  If the lifestyle doesn't fit then maybe it's a bad decision.