I have tried it few times for various things. One was helping me to do some minor coding to deal with a 3D printing program I use, I though this would be its bread and butter, but it took me about 4 or 5 tries before it got the right answer to my problem.
I tried using it not to long ago to look for a car audio amp that would fit my needs. What I noticed is that when it tries to give specific model number and stats, if it is for car audio, or other automotive part , it does a horrible job. Often giving me part numbers that don't even exist or specs that completely incorrect.
Sometime I will ask it to double check its answers, or I will just go a head and correct it. Some times it will try and give an excuse for its error other time , it justt admit its incorrect. It is an interesting program though