I drive a cabrio and there are a couple of blind spots.
1. Left side mirror needs an additional little dollar size mirror so you can see what is directly over your left shoulder because the rag top obstructs your view (up or down).
2. Right side mirror needs an additional little dollar size mirror when the rag top is down. When it's up, you can clearly see over your right shoulder out the passenger side window, the little side window and the rear glass window.
3. The rearview mirror is somewhat useless when the rag top is down because you only have about 2" of view over the rag top when looking in the review view mirror. I imagine if you're tall, you have a better rear view when the rag top is down. At 5'3", I find myself popping up a little to see over the rag top while trying to change lanes to the right. Other than sitting on a telephone book, I'm not sure what would help this obstructed view but those side dollar mirrors will definitely help once I mount them.
Unfortunately, it's been too cold and rainy. However today it's in the low 50's with partial rains. If I remember and the weather is clear, maybe I'll mount them tonight.
Hope this first hand knowledge helps you! BTW, I wouldn't trade my cabrio for any car. I LOVE IT!!! Regina