ELM327 interface

That such friends I have heard a lot about the elm327 interface
that serves to scan Obd11 vehicles I would like someone who has experience in the subject could share some knowledge or data since it is very economical and according to wonders but some opinions are not more

I would also like to inform myself, I was looking at the integrated, it is basically an OBD (automotive bus) to RS-232 (PC bus). A time was intended to buy the integrated and put together the adapter, but with the price that the equipment has in the market, the penis is not worth it.
I hope TMB opinions!

Good afternoon!!
I bought one in a Chinese store for my mother's accent and the truth goes well. I lello the failures I had. Remember that he is a codes reader and scan tool. You won't let you make great modifications in the car. Here it also costs 12 dollars that have been 10 euros (more or less) with the shipping costs included, it takes me to arrive on 2 weeks or a more Pokito. I consider it a good purchase.
I leave you in a link for you to take a look, there is also to connect through Bluetooth but that does not try it.
A health
www.aliexpress.com/snapshot/104419220.html