We got the 72"-144" and it's very nice!  The brackets are good quality, not thin or flimsy so should hold up without bending like some do.  Be aware if you don't need the full length that it comes in three pieces - we used it for a double patio door and only needed to use two of the three so don't be confused or think you got a length way too long.  Just make sure you read the instructions and use the ends with the threads - easy peasy!