Because of "implied odds", I do not like it because there is no guarantee that he will pay you off another 600 chips if you hit your set. There is probably a 25-33 percent chance he has aks and raised to define his hands, and also a chance he has 99, 88 etc. Thus, if the flop misses him, he may raise another 240 then fold to your over the top. To me, it is too speculative HU like that. I say save the valuable 120 for a better spot.