This kit comes with 28 tips, 2 couplers, and 2 reusable icing bags. The couplers are really nice. This is the first time I have ever had the opportunity to use couplers (no other set I've received had them). The coupler ensures that the tip stays put and the icing can't get around it to leak out the edge of the bag.
Having the reusable bags is really nice as I haven't been able to find a place yet to get the disposable bags. Of course I haven't looked online. The tips are made of stainless steel so they are easy to clean and shouldn't rust. This kit also comes with an e-book that helps to teach you how to use the tips in a way that will make decorating cakes and cupcakes easier.
You can get this item here on Amazon.
So far I really like this set. It works well and with the added benefit of the couplers, there is usually less mess. I would recommend this kit to anyone who likes to bake.
Have a great day!