I have a clear cover the runs from the bottom of the windshield down on my RV... Would I add it to my car? No. Why? Very expensive to repair and 90% of the time if you have to remove it, it will lift paint. Ask me how I know. But, that being said Plexus is my #1 choice, 303 Protectant or Protect All are my # 2 choices.
If your looking for a very good cleaner you might want to look at VOOM... It come in a concentrate and I use it in a 5:1 ratio. Great for cleaning bugs off the front.