Within 1% of the skan used at the mall and more accurate than my x3200 stand alone chrono. So yeah pretty good.
Its not with out faults though.
Front part of tracer unit cover is a naff plastic I replaced it on both of mine with an aluminium disc that is loctited into place. I could send you one if you get one.
The thread on the tracer is slightly slack so you have to use ptfe tape on the thread otherwise tracer can lean and ruin your accuracy.
Pretty simple fixes but thought I should point them out.