Clazzio PVC on leather trimmed seats: any experience, yay or nay?

I purchased the Clazzio PVC seat cover for my cloth seats on my SR5. Now that I have leather-trimmed seats, I am looking at repurposing the cover for said seats for practical purposes. I do a lot of field work during the summer and purchased the cover to minimize dust and dirt build-up on the previous cloth seats; same idea for the current leather-trimmed seats. Has anybody done this? Any possible disadvantages long term? I apologize if this has been discussed elsewhere; I tried but could not find a specific thread on the subject. If there is, I would appreciate the link. Thanks.