Some aspects that I love about the RDP is the ability to have the entire dive planned out before getting in the water. I knew depth, bottom time, the minimum SI if needed to do a second dive, etc. You can get a lot of information from the dive tables. Just know, that if you dive with the computer, you can't use the computer information on the RDP. Think about it, as a beginner, you should be practicing safe diving habits. If it's not planned, why risk it?