I have been working with OpenCart for more than 2 years. I have a lot of experience working with this system and I will try to describe the advantages and disadvantages of it.

"vQmod™" (aka Virtual Quick Mod) is an override system designed to avoid having to change core files. The concept is quite simple... Instead of making changes to the core files directly, the changes are created as xml search/replace script files. These script files are parsed during page load as each "source" core file is loaded with the "include" or "require" php functions. The source is then patched with the script file changes, and saved to a temp file.

1. I want to share my knowledge with somebody.
2. To improve my English - I am a Ukrainian and my English is not very good so I decided that the best way to improve it is create English blog and regular write posts in English. I need your help for this. Yes, your help, my reader! If you see some grammar mistake in the text, please, let me know! I will be very appreciate for it! Really.