It really works! In 2007, results from the DEGAS (German Multicenter Gait Training Study) have been published showing that 20 min gait training with GT I (the previous Gait Trainer model) together with 25 min physiotherapy has increased the chances of stroke patients to walk again by 150% in comparison to those who only received physiotherapy.
Since then many scientific publication as well as two Cochrane reviews showed the effectiveness of the Gait Trainer.