anon: Sorry to hear that. The only thing I can say to that is that I'd write the same review even if I was not advertising this product. If the review was bad I wouldn't advertise it, and if it is good, I get to make a little side change for my efforts on this blog.
The main thing I try to keep here is being sincere, and not being "sold out". If you feel that it's come to that, maybe I'm doing it wrong. But so far, you're the only bad feedback I've heard so far on this theme.
If I heard enough bad feedback I might consider doing it another way, because the last thing I want is to come off as a sell out, but I feel just fine promoting stuff that I believe in.
Is it wrong to have a win-win situation in this case?
An interesting question. For now, I'd say "yes".