I have used adobe edge reflow, macaw, webflow, pingendo and much more, now I came across coffeecup RSD, which I am really interested in getting. Before I do get it, I need to know do I need to start off with the RLDP or I can just go straight to RSD. Are both needed?

Other question....
Is RSD easy to add a slider like Revolution Slider via the HTML Element feature?

I would go for RSD if your not into coding much content.

Eric,
Similar question. I've been using VSD for about 6 years and need to move up. Don't know a lot about coding. Sounds like you would recommend RSD for me as well. Question- will all the other apps work with RSD (such as Button Builder, Menu Builder, Web Calendar, etc)? I looked at the superpack offer for $299, but that includes RLDP which I don't think I would need. Will I be losing anything by keeping it simple?

Yes, all of CC's apps work with RSD by using the html element. Buying the super pack is how I got started long ago. You may not use all the apps now but as you build sites the need for more always seems to show up.

I use HTML Editor , Email Designer, Site Designer, ( RLMP, Menu Builder both windows and Mac ) and Web Form Builder, lately Responsive Slider which yet to get really into it, Beside all, I use few others as you mentioned above plus Free and paid Bootstrap builder, They are all good for certain project.

CoffeeCup has great support and perfect range of products for web development .

I suggest , Site Designer, Menu Builder, Email Designer, and Form Builder which are greatest in market .

Don't forget Responsive Slider too.