yes , ok , xprotector is unstable because it is a very new product.
And this (i think) because it includes some very new characteristics such as the Ring0 binding , that is an "unknown word" for some other protection tools.

Take a look at the whitepaper...it is a very professional project.

Ok , every good project needs time...beta-testing , feedbacks and i believe
that everyone (interested in protection technology) must help good programmers.(this is my personal think)

I am using also , asprotect , armadillo and ok these versions are very very very stable.
They have 99% compatibility.
But these protection tools are available since the last 3-4 years.
And as we can say , the "beta-testing" is already completed.

XProtector as i can remember is only available in the last 1 + year.

But let's see the guys from xprotector team what they will make in the next 1 - 2 years.
After that period , we can again give our positive or negative vote

But again , i don't have seen an unpacked or cracked version and i don't believe that the biggest's minds arround the globe don't have tried to crack it.
Am i right ?

Regards,
VD