The Delta 23 is already a real Klopper and makes triple-coil evaporator (and the corresponding Watts reserves on the unit) powerfully much steam. The workmanship is good and I bought it because of its robust construction. Airflow works beautifully. The Delta is operated with me on a Sigelei 30Watt. To me it was frankly even with low amp a little too much steam, that's why I have a C3 dual-coil evaporator reingetan and so it served its purpose for me perfectly. Especially because the 6 ml tank not be constantly replenished-ranging needs sometimes two evenings. He Gesifft with me until now not a bit but a vaporizer has bubbled times, but that was done NEM exchange. If you want a lot of steam, but not fancy but Selbstwickelei has (like me) is well served by the Delta 23. Recommended!