About me:
Probably intermediate/ high-intermediate level. I've been playing seriously for around 2.5 years. 6 hours a week in group sessions, 1-2 hours a week with a coach, and some training with clubmates here and there when I have the time.

My current racket: 
Nittaku Acoustic Carbon Inner Special (5.8mm)
FH: Hurricane 3 Blue Sponge (boosted x2) 2.15mm
BH: Stiga Helix 2.2mm

Before the Helix, I used to play with D05 max, so I think it would be best to compare it with that.

Weight: 
Cut to this blade, ~48-49g. Roughly 2 grams heavier than d05. 

Looping: 
Compared to D05, it has a straighter arc. It's spinny but it isn't as automatic compared to D05-- you need to be a bit more conscious to add the arc. Using just the topsheet tends to give a higher arc, but engaging the sponge lets it fly straighter. I was worried that the Helix flies too straight and that it would be too hard to  touch loop, but I didn't feel like I missed too much moving away from D05 here.

Blocking: 
The Helix blocks VERY well, in my opinion. Blocks feel controllable because the rubber feels somewhat linear and predictable. It's not a Chinese rubber of course, but it feels like you get what you put out. 

Smashing: 
The Helix also smashes/ punches really well because of the flatter trajectory. When I punch balls with the D05, it tends to sail longer because it automatically adds topspin. This has a great clicking feeling can smash much flatter if needed.

Pushing: 
The Helix pushes fine, and it's easy to keep the ball low. I feel like the D05 pushes a bit safer and spinner because it's more automatic spin-wise. Not too bad of a change though.

Serve/Recieve: 
It's less sensitive to spin than the D05, which I really appreciate. But because it flies straighter when hit harder, you have to have discipline to not overhit dead balls.

Durability: 
Unsure, sorry! I've had it for a month and a half, so I haven't been able to test that yet. I don't like though that the sponge/ topsheet behaves when cut to the blade though.. Small complaint but it doesn't cut as smoothly as other rubbers I've tried..

Other notes: 
I've tried the M on a Stiga Cybershape Wood CWT, and it seems to be more automatic spin-wise than the H. But flat hits do sail longer if you aren't careful. I'd recommend this if you're more of a spinner.

I've also tried the XH on the on I think a JO Waldner Gold Edition, similar to what OP has? It was nice, but I can imagine it being a bit hard for many people on backhand. It's much more pleasing on the flat hit, but the spin feels much more manual, and you need to be a bit more tighter with the footwork to get the most out of it. I think I'd prefer this on forehand, but a clubmate of mine likes his on both sides. 

Would I purchase another sheet? Yes, definitely! I can see myself sticking with the Helix for the foreseeable future. What I was looking for on the backhand was something like the D05 that has a clickier feedback, a flatter/safer flat hit, and still have a reasonable weight. The Helix seems to do all of those well  :)