this will be a little review as my finger was devoured earlier today by my angle grinder while refinishing the garage. ;(
firstly , at I thought it was kind of cheap and unintuitive to use. - which ultimately it was all user error, I really had no idea how to use it, and found myself using a drywall knife for application,. bad mistake. for superior results pretend it is a kind of modeling clay and you apply it by hand. yes it does get a little messy, but use your fingers and palms, just keep a really wet rag next to you while using. it is kind of like using wood putty you take a bit - appox t he size of the hole you are patching and plop it into the hole and slowly work it into the hole. after this you use the wet rag and slide it gently over the entire hole and you will find that it literally smooth's off into the hole and levels with the concrete. poof - that simple then gently repeat 2-5 times as needed to get an ultra smooth and matched level to the surface. - I hope that made sense? so ultimately it patched my dilapidated slab and now it looks almost brand new, now I will seal it with a floor epoxy kit to hide the discoloration from adding new material to an old slab - looks kind of like a cheetah now. ;)
hope this helps? :)