The Wingman and Sizekick are not on par with the Wave in terms of utility or quality - which should make sense as they cost half as much. The Wingman's scissors truly stink (thats my experience only), the file is short and lame, and the edges of the handles are sharp. Most tools don't lock.
The Wingman and Sidekick are better than a handful of air. I'd sure rather have one of them than nothing. But given the choice, its much better to save up for a Wave, Swisstool Spirit or other quality tool.
I have both tools. The Sidekick is one notch better than the Wingman (again, in my view), because the Sidekick does not have the crappy scissors.
If you have $25 that you don't know what to do with, I say go for it. But better yet, just hold out for the real deal.
Wingman review here.