A Xenon TPC with an active volume of 207 liters has been built to stud
y the neutrinoless double beta decay in Xe-136. Data were taken in the
Gotthard Underground Laboratory with 5 atm of xenon enriched to 62.5
% in Xe-136. A total of 6830 hours of data has been taken. New limits
on neutrino mass and majoron decay are presented.