There is nothing wrong with them. And there others around the net and at the OSC and Zen forums.
Virtually all OSC templates will work, as well.
As far as "worth the money" that is something only you can decide, as we all have different levels of pocket depth.
As far as good / bad, work / not work - they will work, at least all I've found. Keep in mind that SOME mods may also affect the template, so if your cart is heavily modded, you may have to also adjust the template.
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