It helps... sort of - I just checked and see that we've dealt with FavSEO for just over four years. Obviously if I'm just now deciding to remove the app (and leaving a review prior) it wasn't all that bad. If you're looking for the low hanging fruit, to fill some fields that are otherwise empty, it's helpful. It will indeed take a look at your entire site and let you know which categories and products have little if any meta data for SEO purposes and give you a couple of suggestions on what to do. As in... "Missing Page Title" so you should "Add Page Title" so in that regard it is helpful. But to be honest that's about the extent of it's usefulness, again, not all bad. As far as seeing a real world impact, watching our rank climb as a result, that's so hard to tell, the SEO waters are just so muddy one can only assume it may have helped a bit but it was really just the work we did not the program itself. Think of it like someone walking around your house saying "You missed a spot", "There's another" but that's it, you need to grab your paintbrush and get to work and how well you do so determines the outcome.I will also point out that we utilized them for much more. For well over a year we paid hundreds per month for some detailed work. They would identify a set of keywords and really target them, sending reports of what they did, the impact it was having etc. However again, we didn't see much real world results. I gave them a long fair trial at which time they actually agreed that it wasn't really doing much for us.So, the little $20 a month app - not bad, use it until the score cards read good, learning as you go then there's little need to keep it unless you are constantly adding new product. The extra work - the hiring them to take care of all the SEO for you... I'd strongly suggest you don't and that you rather take the time and do it yourself. In the end nobody knows the company and the products you sell better than you and when paying someone from a land far away to come up with content on a product they've never seen for a business they'll never know – well, you get what you pay for.I will say on one last and positive note that the communication and overall ethics they exhibited... were good.