For slide-formatted pdf to ppt, I use a number of tools with varying results. Because the results are dependent on content -- as well as the initial setup of the ppt environment (backgrounds, etc.) -- I suggest you experiments with some of the free tools before moving on to the more costly solutions. For other than extracted slides ... I have not found an acceptable tool to automate the conversion of pdf files into PowerPoint. But I do use Word To Pdf Conversion Professional to export graphics to individual files and to recognize text using OCR. Then I cut-and-paste the wanted copies into my PPT format. I do my footnotes as the last slide -- then I can use hand-outs, projected talk slides, or make the entire package available on the web.
Other than the initial setup of the presentation (backgrounds, font, etc.), I do not need any special tools to convert from PDF to PowerPoint, so I assume that the same applies to other conversion tools. Preliminary remarks -- conversion problems to avoid: First, I suggest you test any tool by creating a PPT file from the PDF and comparing it to the resulting PowerPoint file. This will be extremely useful when a tool tells you: “The output is incompatible with PowerPoint!” I think the first reaction is to give up on your effort since it isn't compatible with PowerPoint. But if you run into any problems, you can get to the bottom of them later. Second, be aware that the PPT file size is proportional to the number of notes -- so if you have 20 slides, the PPT file will be big. You can work around this by adding extra.