One of the best reducers out there 2 stars -3 min 1. The best 2 in a defensive mannor yes. It isnt offensivly good though without its bonus and isnt really worth giving more then 2 pillz. Gil is best as a pilling card or a fake out kind of card. sasha is good as a attack modifier. When it comes down to price spiaghi is wonderful to have.
I'd say that Spiaghi is a very good 2* DR.
If you want to play with montana. He is very good with the bonus because he could pill 1 and you opp (supposing they aren't using a attack manip card/clan bonus) will have to pill at least 2 to over come Spiaghi.