Fluid mask version 2 is now out for Windows and Mac users
Main new features I think include 16 bit capability and a new "jigsaw" image approach, which is quite revolutionary and state-of-the-art.
I have seen many people looking for independent reviews, to which I would say this;
Unless you are a dyed in the wool user of old methods then F M is the future and the sooner you get into it (it will involve a learning curve) the better, especially students and trainees.
Remember though, F M was designed as a high end add on tool.
IF money is an issue and you cut out infrequently and have lots of time or your cut outs are simple ones against a distinct background then you should stick to Photoshop's inbuilt tools.
So the choice is simple - keep to Photoshop or add on F M, in my view all other masking add ons are now out of date regardless of price.
if in doubt try the fee trial download from the F M site
www.vertustech.com (you may even win a free copy)