Clarification needed for Recommended approach on SMD agent registration

Dear support.

since smd agent introduced, We are following SMD agent SLD registration strategy, we could say number of places sap mentioned SLD registration as the recommended approach, this approach is better, it saves lots of our time on maintenance.

http://wiki.sdn.sap.com/wiki/display/SMSETUP/Diagnostics+Agents

But recently , we got introduced to SMD agent 7.30 SP3 installation guide, its mentioned SMD agent direct registration is the best option,

Note 1829024 - Inst. 7.30 SP3 - Diagnostics Agent installation,

Now I am confused, which is the best option, what is pros and cons for each approach.

Can anyone assist us.

Regards

Jansi