This is the best Yomega yo-yo to date.
They really nailed most points on this one! I've been playing with it for the last couple days because I wanted to write a full review. Skip to the end for the Bottom Line, or keep reading for the full review.
Gap Width: First of all, you need to know that it has four spacers, all different sizes--3, 5, 6, and 7. I think it comes with the 3 and 5 around the bearing (the other two are in the sides). So obviously the first thing I did was switch to the largest, the 6 and 7, because I like my yo-yos unresponsive. The spacer feature is great because the gap will be consistent, unlike the yo-yos that allow you to unscrew them a little bit for a wider gap (even though you can shim those, this is built-in).
Response: It uses a smooth rubberish disc for response...it's just part of the yo-yo, not a separate pad or anything. It works great! (I bind since the gap is set to the largest.) I'm a fan of o-ring response, so this is similar. It's very smooth on the string, and returns with an easy bind.
Size: This is my main criticism. It's like they decided to make it bigger, but in the wrong direction! Compared to the X-Con, it's about half a centimeter larger in diameter, and half a centimeter
smaller in width! This is obviously personal preference, but I love the X-Con size (which is fairly close to an FHZ size). Some people may like the size though.
Extra Features: Okay, so the big hype around this yo-yo (as discussed in another thread) is the "squish" feature (officially called the "soft-core system"). The halves of the Crossfire are plastic, but the middles contain two layers of rubber stuff (one of which is the response). Then on the very outside is another flat plastic piece to keep it tight with the axle. The rubber enables the yo-yo to "bend" if you squeeze the halves together on one side, or even flatten completely (so there is ZERO gap)!
A couple things I was wondering before I actually played with it: One, will the halves stay parallel? If not, there will be MAJOR problems. Two, is it really even needed? I've
never broken an axle.
Well, so far...it mostly works. The rubber is tough enough that it pretty much retains its shape, but will still bend if squeezed. It won't bend just from doing tricks with it, it's tough. Just from being in my pocket, it's been fine, so you probably don't have to worry about it bending on its own. From testing it, if you just squeeze one side, it might stay angled a little bit. If you "flatten" it, the gap will get a little smaller! However, it's easy to fix by just pulling the halves apart gently, and it will go back to normal. I don't know how well this will last in the long run, but it seems like it'll be fine.
As for whether it's actually needed, it's a nice feature. It's probably not something any of the hardcore players will need, but for kids who have messy rooms and leave their stuff lying all over the place, it makes a lot of sense. Anyone (parents) can step on it and it will be fine! This makes it a fantastic beginner's yo-yo, especially because of how well it plays! It would also be a good yo-yo to throw in the bottom of your backpack and not worry about.
I should also mention that the yo-yo is pretty easy to take apart (you need to take it completely apart to change the spacers around), but it won't fall apart just from opening it. This means it'll be fine for beginners, as long as they don't lose the bearing or inside spacers.
Grinding: It's smooth plastic, but somehow seems to "stick" a little bit. It's pretty humid here right now, but Freehands still seem to grind better. The shape also isn't as rounded as it could be, which might also make grinds harder to do. It has no rim lip, so inner rim grinds are impossible.
Bottom Line:
+ Adjustable gap using spacers
+ "Squish" feature (soft-core system) that works well enough
+ Great response system
+ Good Price/Value
+/- Shape and size
- Bad Grinds
For advanced players, 4 out of 5 because of the not-great-grinding-ability, and shape.
For beginners, an enthusiastic 5 out of 5!

It's a great price for a yo-yo that is extremely durable, and has a response system you'll never have to change!
Other Notes: It'll be interesting to see what modders do with this (if anything). If you can cut the diameter down in size a bit and round it off, it might rule (but that could be a lot of work). There are also so many parts you could modify, including the rubber response--it might be easy to recess or something.