As always: It depends. There are great communities and in-depth discussions on niche topics to be found on reddit, but of course there's a lot of low quality content. Particularly when it comes to product recommendations, many reddit communities seem to have become an echo chamber and settled on the same few products they have been suggesting for a while. Often those aren't necessarily bad recommendations, but they are far from in-depth and rarely backed by any actual experience with or tests of the product in question - instead it's become a popularity contest.