Is the Park Tool Allen Wrench going to strip out bolts? I am fed up with cheap allen keys.  I've bought a few from local hardware stores, but a 5mm is usually way off, and I end up rounding off the key, or the bolt.  I've thought about buying this parks allen key:

http://www.amazon.com/Park-Tool-Allen-Wrench-4-5mm/dp/B005R638TC/ref=sr_1_2?ie=UTF8&amp;qid=1423706361&amp;sr=8-2&amp;keywords=parks+allen+key

It has 5 star review from 5 customers at the moment, but I'm still wary.  Anyone have any experience with it?  Or is it just junk that they slapped a parks tool sticker on?

Also, if anyone has any advice on allen keys from their experience I'd love to hear.  Is it worth paying for Snap-on keys, or something similar?

I'd love to hear others have this problem too, and it's not just me that can't loosen or tighten a brake lever without rounding something off.
I have never had a problem with Allen keys rounding. Using the correct size, using them correctly (Inserting them fully and not letting them slip out the bolt) and not using too much torque for the bolt size means even cheap Allen keys will last a lifetime. 

If the bolt head has rusted or has gunk in it, you sometimes cannot easily get the Allen key in all the way. In this case cleaning the hole is required. Abusing the bolt/allen key by only inserting it part way is the most likely cause of problems. Workshop quality tools will survive abuse such as this (although it's more likely the bolt won't).  

If you are having problems rounding the Allen keys, workshop quality tools to likely just move this problem to the bolt, making it a much bigger problem.