I have been using the EtchMaster for over a year now and would thoroughly recommend it, it gets used for nearly all my adhesive dentistry and is particularly useful for low retention Class B lesions and Cerec treatment.
The refills are quick and easy too fit onto the special adapter, and the metal nozzle can be conveniently bent to aim the flow exactly where you want it.
I would now not be without this product.
Ed Moncrief
2th Dental, Market Harborough