Alternative to Apple MagSafe power adapter

Just got the MBP 15. Apple's own power adapter has a weak point in design where the cord exits the adapter. My son's already on his 2nd adapter after a year and a half.

Instead of taking my new one on trips, has anyone tried the cheaper alternative at: (link removed, not needed)

I would still be careful but don't want to spend twice as much if it may be trashed more quickly by the many business trips I take.

After seeing to many horror stories on the web I would stay with Apple its cheaper than a new logic board.

The newer MagSafe adapters have stronger casing on the cord, it's not as much of a problem as it had been.

Unfortunately, Apple has the MagSafe connector patented and has been known to go after third parties that try to produce unauthorized knock-offs. I'd be willing to bet that this company either won't exist or won't be selling that product once Apple legal has their way with them. So, I wouldn't count on the warranty.

Personally, I'd be wary of knock-offs like this. If it isn't well made, the consequences could be dire.

If you want a cheaper one, I'd check out OWC's refurbished units:
Apple MC556LL/A MagSafe 85W Adapter for all MacBook... in stock at OWC

I have been using the same knock off adapter for over a year without incident. The only difference I notice is that when I unplug the adapter the green (or orange, depending) light stays on for a few minutes after being disconnected.