I got this unit has I've had several hand operations and can't do well with a normal caulk gun. This one is amazing, I used it to caulk seams at our 50 y.o. log cabin. I used dozens of tubes of caulk last weekend. You do need to disassemble and clean it after 30 tubes of caulk, went well and worked like a top when done. Before each tube was done it pushed out one loud pop of caulk but it was easily smoothed out. It was consistent and saved my hands. I'd highly recommend it but you do need to clean it out with some light solvent that dissolves the caulk but not the plastic/rubber.