Review on a reliable OBD2 emulator

[bitwrite]

Hi

I am working on project that requires processing of OBD2 signals that are given out by an OBD2 port, to do this I am planning to use an emulator which generates obd2 signals similar to the obd2 port signals from a vehicle.I found a couple of emulators, but I need a review so that I can purchase the emulator.
If anyone has used an emulator similar to the ones that are in the following link please provide a suggestion of an emulator that you have used and the authenticity and the reliability of the products in the links.The protocol that the emulator needs to support is ISO 15765-4.

http://www.ukobd.co.uk/vmchk/ECU-Sim...yDic-1010.html
https://www.scantool.net/dev-tools/e...usim-2000.html
http://freematics.com/store/index.ph...&product_id=53

Thanks in advance