I have used mine infrequently totalling about 90 minutes of use. It seems to stop cutting when reaching the depth of the blade (about 4.5. Inches) although the saw continues to run. It is less effective than a standard chainsaw as every other cutting tooth is missing. Today, when I tried cutting through a 6inch log, it started sparking and burnt out within a couple of minutes. The chain had been running freely up to this point.
This is the second titan product I have had that has failed long short of it's expected life.
I would avoid this unless you accept that it's not a brilliant cutter and it probably won't last very long.