We do not recommend for or against any of these, as we do not have time to review these or measure their performance, and we will not endorse something without being able to vouch for its performance. Red Hat provides an RHCE Exam Prep Guide for use by persons who want to prepare on their own. This is a very superficial guide and is not offered as a complete or thorough self-paced program. It is only going to be useful by someone who already has a significant level of user and system administration knowledge. The RHCE Exam tests professional level Linux system administration skills and Red Hat states clearly that such skills cannot be obtained through training alone.
Good training can do part of the job, but the rest is up to the individual.
Individual outcomes may vary, and no one can guarantee a specific result of any preparation effort or investment in training. At present, Red Hat's policy is to make sure that RHCEs and their employers and customers can verify the specific version number of an RHCE, and make their own judgement. This has not been decided yet and has not occurred. The professional performance of those who earn RHCE is so positive that it may not be necessary to require re-certification as frequently as other operating systems have historically required. Red Hat Channel Partners, ISVs, OEMs and Service Providers are invited to have their RHCE staffs certified on the current version of Red Hat Linux.