Waves just screams SCAM in my face. It's a platform to build scam projects.
That, of course, doesn't mean the price can't go up.
I can't tell if it's scammy or not, but they rose a huge amount of money in their ICO. With such amount of money is quite hard to not do anything (angry investors can reach you sooner or later and we talk here about somebody well known). So they'll deliver, although slower than some would like. And they actually started delivering.
People complained and still complain of Ethereum in the same manner and still it's considered a success (especially by the investors/speculators).
PIVX also looks very good.