Dear Farney,
I think if you applied that by yourself directly is better, because you can do that, it's very easy.
First of all, you will fill the form, then there is an authorization form that you and your wife (if she is applying with you) must fill and sign and to be scanned and send with the form to there email which will be provided to you.
If you did that directly you will receive the status of your file process directly through your email which i think thats better, because if you did that through your consultant, he will receive the latest situation and then will inform you about it.
For your information, i did that directly, and after 4 weeks, i reeived the first email from them which they informed me that the process is started.
Best regards,