My Spark strap gave up this morning... The plastic loop just fell off, just like most of you. I called Support and they swiftly arranged for a replacement. It took no more than 5 minutes, so I'm quite happy I won't be without my watch for long (thanks Tomtom!).
I know the Spark 3 strap is compatible and it seems like the large strap is a new design. Is it more durable than the older design?