what is the best brand for rainguards

i have know that there are different brands but which one is the best?
i am planning on buying me a set for the sides and the rear
window of my x cab tacoma. i heard that some of them will
crack in hot weather also warp, and collapse.

I have used Ventshade on my previous truck with no problems. My current Tacoma came with Ventshades also, although one of them is warped, I believe from the factory as I have not bent it back yet. I'll let you know if I successfully fix it. Overall I would say those would be the best as long as you install them properly (such as cleaning the surface prior to application). I really have not heard of any complaints about them.

Ventshade here also, over 5 years installed, still looks and works great.

Good Luck