Yes and no. Making music with anything helps improve your sense of melody, harmony, rhythm, timing and pitch, so in that sense it is great. There would be a transition to a regular guitar that would be needed of course. But you can make music with anything. Watch Jack White make a slide guitar out of a few bits of scrap in “It Might Get Loud”.
Personally, I think it is a bit overpriced for what it is. Decent real guitars like an Epiphone Les Paul Special can be had for the same price and these will take you much further in terms of conventional guitar playing. This 3-string is pitched at kids, who might find the ease of playing holds their interest long enough for them to get suitably proficient for them to really enjoy making music. If you’re just a bit more determined than that, then I’d suggest just getting a regular guitar. The learning curve seems a bit steep at first, but it’s really not that hard.
