PEX piping...love it or hate it?

[Jason Burr]

I'm interested on what folks think of PEX.  I love the stuff and find myself pulling out perfectly good copper pipes and replacing with PEX.  For those of you who have it in use, how long has it been in place?  Have you ever had a pipe burst from freezing.

For those of you installing PEX, do you run it using a manifold system or is it more of a traditional branch system?

I've currently use PEX b and have never had a pipe burst.  I've done freeze test as well and not been able to burst the pipes.  However, I'm always skeptical of the so called "tests" that freeze pipes that aren't under pressure.

Even though I haven't had any issue with the PEXb piping, I'm probably going to switch over to PEXa.  I've read that PEXa is even more resistant to bursting.