This module just saved me from insanity. I generally prefer to actually debug code rather than to stick glorified print statements all over my code. However when you need to peek inside code running in a server what else can you do? However this does a lot more than just give glorified print statements, and what it does it does well. For a start it is environment parameter controlled so may be if your test environment is set up so that the hooks need not carry across to production you can leave the stuff in place. Secondly there are a lot of associated plugins that provide logical and useful chunks of information.