It’s one of the pre-JTV Variax models, either a 300, 500, or 600. I can’t tell them apart but others will be able to tell you exactly which model it is. Regardless, they are all very similar and their modeling is identical. The differences are in the build.
Whether it’s any ‘good’ depends on its current both physically and electronically. It looks to be in good physical shape but you would need to test the electronics. For its time the earlier Variax models were, and remain, quite good. Some still prefer the Acoustic and Spank models in those guitars to the upgraded modeling beginning with the JTV series.