Product review (5 stars): Just take your time and it works great!
I think I need to review this item in a way I haven't yet seen, for those of us not experienced in converting stoves who have a little trepidation at doing so.
What is received in the kit is a baggie with maybe 15 orifices - small caps to be screwed on top of each of the range's burners.  And an instruction booklet, that's complete, but a little hard for a novice to understand.

There are described 5 main steps in converting the stove:
1. Convert the main intake from natural gas to propane, by unscrewing a small capped item in the back by removing the bottom oven drawer, flipping it over and screwing it back and replacing the cap.  Even I had little trouble with this one.

2. Screwing down the oven gas intake to convert it to propane (less gas is needed).  This one always stumps me, when plumbers say to "hand tighten" or "do no over tighten".  I understand the threads may be stripped by too aggressive tightening.  But, this is less likely with a retired grandmother (me) than with a strong plumber.  It took some effort to tighten this down low enough to limit the flame throwing of the oven burner.

3. Same for the gas intake for the separate broiler intake.  Not hard to do, just hard to get tightened enough to get the flame to the required (lower) length.

4. Replacing the orifices - the little pieces supplied with the kit.  It wasn't hard to remove the burner top and two screws holding the burner down, then unscrewing the orifice already in place.  Then matching the size on the removed orifice and replacing it with the recommended size in the booklet.  There were extra sizes, so a handful of extra parts.  They recommend putting the removed orifices in a baggie & attaching it to the stove in case you ever want to convert back to natural gas.  Good idea and easy to do.

One thing I read everywhere was to BE CAREFUL not to drop the new orifice into the stove top.  You cannot lift up the stove top to get the orifice back out (unless you remove all screws and undo the gas pipes to the burners - too tricky for me).  I had read about using a piece of paper towel inside your socket to hold the orifice and keep it from falling out.  It worked to a point, but, naturally, I did lose the orifice.  DISASTER!  Or so I thought.  I have a hint here that may be useful to others - if you lose the orifice, tilt the stove to the side nearest where you dropped it (to get it to roll to that side).  Then tilt the stove to the back.  Doing this allowed my orifice to roll to the side, then to the back and drop out of the area by the burners and onto the railing below the drawer where it was easy to retrieve.

After this, the stove has to be connected to the gas line according to the stove mfg instructions.  Then the stove burners are adjusted (mine by pulling off the knobs and using a thin bladed screw driver), to the lowest they can go without going out when turned to LOW.  And the oven and broiler both adjusted by adjusting the air flow (a piece above where you adjust them to limit the gas for propane in Steps 2 and 3) - to allow more air if the flame is too big (likely to be).  This has to be done after the stove is connected.

There are a couple of good videos on YouTube for doing this.  The included instructions were there and complete, but a little hard to follow where the actual adjustment was located on the range.

All in all, the was a great product.  I give it a five star because I, an amateur, was able to do it relatively easily (although with some trepidation).  And, now that it's hooked up, I love my new range.  But that's another review.