After the thought of having to constantly transfer the carseat base from my Jeep (which I drive during the day), to the family minivan (driven any other time) in the cold miserable winters in the UP of Michigan, I spent the money and bought an extra base. So worth the money!! Now I just load my precious cargo into her seat and it doesn't matter what vehicle we are using. Plus you don't have to worry, if the vehicle the base is in is being used, you are not stuck at home or trying to rig the seat in the other car (which isn't safe for baby), without the base. If you want to save time as a new mother and decrease stress, buy the second base. You won't regret it!!!!
Are you sick of trying to remeber getting that base out of your car to put in another one? I know I was, so after a week I decided it was worth it to spend the extra money for an additional base. Now if I am in a hurry or just have my hands full and need to put my Marissa in another car I can much quicker. I advise if you have the money to spare to do so, It will make your life easier!