I bought some Alba A arms a couple of year ago and I'm mostly happy with them. They're not super stout and will ding fairly easy on rocks. I also recently discovered that all four ball joint boots have failed already.
The blaster isn't my primary off-road vehicle and so the Alba A arms are suitable for my occasional usage. However, I would have dropped the extra $ for some more durable arms if the blaster was my primary riding vehicle.
All in all I'd give them a grade of B-. Had the ball joint boots lasted many years like they should have, I would have given these arms a sold B.