The CUPID-Mo experiment, currently collecting data at the Laboratoire Souterrain de Modane, is a demonstrator for CUPID, a proposed next-generation successor of CUORE, the first ton-scale bolometric double-beta-decay search. CUPID-Mo is probing neutrinoless double beta decay of 100Mo with an array of 20 enriched ~0.2 kg Li2MoO4 crystals and Ge light detectors allowing to distinguish alpha from beta/gamma events by the detection of both heat and scintillation light signals. The demonstrator exhibits excellent bolometer performance and excellent radio-purity levels of the crystals, better than the specifications of the final CUPID experiment. With more than 2 kg x yr of exposure, CUPID-Mo has set a new limit of 1.4x10^24 years on the neutrinoless double beta decay of Mo-100, the worldwide best value ever achieved for this nucleus.