I was quite pleased with this harmonica, and got a few in different keys. Great value!
The form factor is quite chunky, fatter than most hohners, but the sound holds up pretty well, giving a rich tone and good bends for blues. I would recommend breaking it in slowly for a few days by gently blowing chords (several holes together).
As a cheap blues harp to fill in your lesser-played keys I would certainly recommend it. If you only buy one harmonica though, particularly if you are learning, I would get recommend a Hohner Special 20 or Lee Oskar Major Diatonic, either in C (as assumed by most tutorials / teachers) or F (so you can play a blues in C),
Please note that an Ab diatonic will play blues (in cross-harp or second position) in Eb, so this is the harp you want to play an Eb blues. To find the blues key count a perfect fifth up (7 semitones) or a perfect fourth down (5 semitones) from the key it is stamped with.