Simply the best tool you could have. It is very easy to use. I recommend the one drop applicator, also by Flex-I-File, to fill this applicator. It does clog sometimes, but dipping it in glue will clear it quickly. I normally drop the applicator in the bottle of glue, then use the one drop applicator to suck some glue out, and then fill the touch-n-flow from the back. I have only used this with extra thin cement, and it flows perfectly. It is the best $6 you can spend in this hobby. If you store this with the plastic tube container it came in, be careful not to bend the needle while closing the cap.