Product review (4 stars): Works great - beats calling a repairman
It works as advertised.

In the drawing, it shows the flat bar-type ignitor (which is what was originally in my oven).  However, when I ordered this, I received the round-type ignitor.

Fortunately, it is working just fine.

Assuming you can get part-way into the oven and remove the diffuser plate to allow access to the ignitor, it's simple to install and works just fine.

Buy this for $30 and spend 20 minutes putting it in, or pay a repairman $150+ to do it; it's your choice.  The only thing a repairman can do that you can't is to check the current draw on your old ignitor and rule out the (slim) possibility that there is a problem with your gas regulator.  If you have a clamp-on amp meter (which goes for around $80 at home depot, you can do that yourself too.

I give it 4 stars because it's round, not flat.  But it works perfectly fine.