I've been playing with the cheap eva foam over 3 years.
The 1 photo shows a 3 year old worn piece, while others I had already replaced. That's a high wear, no uv protected area, generater sits there, fuel spilled.
For the money/time involved it's a reasonable option. Great sound deadening, feel on feet, my dog even loves it.
Since it's just peel and stick I use a, wide putty knife to scrape the old one off, whole if possible, to use as a template. Making templates is the big PIA. Acetone, combo scraper, wire brush will get most of the previous stuff off but I certainly didn't do it 100% perfectly. Either way the replacements I've done stick just fine.
I don't even really really worry about perfection in cut/fit, no one will ever see it.
Best of all it looks really nice for a few years at least.