I mostly liked the sale tool, where I put my whole shop on sale. I found it easier to use and more accurate then the EtsyOnSale app I tried once before. This is also a better value for the money I think, and it does Facebook, Twitter and Pinterest posting, which I pay another app for as well. I am probably going to cancel the EtsyFu service and just use this since it works just as well and its all in one service with the sale app and the analytics feature is very nice. It is pretty much multiple existing Etsy apps all rolled into one with a nice easy to use interface.
I am noticing a definite improvement in views and favorites daily using Seller Tools. I am impressed with how easy the Seller Tools site is to use and the versatility of use. I find myself checking daily.
Our views have doubled since using the Favathons! I have been able to save an incredible amount of time by scheduling my social media shares and using the Treasury Tool. We recently started a sale in our shop, and are so pleased with how the sale "looks" on our pages. We have subscribed and we highly recommend the Seller Tools - ALL OF THEM!