We have just purchased our third Spectralase laser unit from you since 2006. We especially noted the difference between the older 810 diode and the newer 980 diode laser. The pulsed operation with the 980 is significantly better than the 810 wavelength. Tissue removal is much faster and smoother without excessive char. The patients seem to experience less discomfort also. A nice unit!! As always your level of customer service is excellent.