Razer Mamba Issues?

I've been looking to upgrade my mouse lately. I currently have a Death Adder 3.5G and I want something new.

I tried the Lachesis 5600 DPI but ended up returning it as the shape wasn't right for me.

I've only been at PC gaming for 6-8 months and I've only really used the Death Adder, aside from the 10 or so hours I spent using the Lachesis.

Anyways the Mamba is essentially the same shape only it has the rubber grips on the side, which to me seem like a great improvement.

A lot of people say it's no good though. Are they just hating on Razer or am I underestimating the PTE issue?

Does the second sensor help at all with the z-axis issue on the Mamba?

I read it has slow loading times for profiles, which is something I find completely irrelevant, I'm not going to do that often, if ever.

So I tried the Lachesis and it wasn't the PTE that made me return it, but the shape. I noticed the z-axis issue, but it doesn't seem like a game breaker. I lift my mouse and it moves down and to the right slightly. That's really not a problem for me. When I lift my mouse it's usually because I'm turning and haven't aimed at all yet. I never lift my mouse while shooting at someone. Also my death adder causes the cursor to move when I lift it too. It's not as predictable and sometimes it goes back when I set it down, but sometimes it can cause the cursor to move even more than the Lachesis did.

So what are the issues people have with the Mamba, and are they legitimate issues?

I'm not really worried about the mouse being worth the price. I can get the mouse for $20 off and even at that price I don't mind if I'm paying a little extra for the looks. I have no problem paying for the looks.

I have the Death Adder which is the same shape so transitioning shouldn't be an issue. Battery life wouldn't bother me. I can only play for 2-3 hours at a time at most.

So I picked one up today, but I haven't opened it yet since I'm not at home.

I'll try it out tomorrow and see how it performs.