My first Nela s*p*r*lex fell apart ... but was replaced FOC with no problem.
The replacement is a year old now & showing no sign of coming unstuck yet.
I just find with the sort of shite jobs I do, the narrow width more useful between sockets & down the side of architrives.
I have a 16" Nela and an 18" Refina, but the Nela does the most mileage.
I do think the Nela could do with a slightly shorter mounting plate, making the toe & heel more useable.
this is where the refina scores points in my opinion.
Both could do with being tougher - But I have just come to accept them as disposable items I guess.