Regarding whether or not this type of screening is helpful, it can be since it can pick up cardiovascular problems in the early stages. With this type of detailed screening, however, one has to be prepared to deal with other "incidental findings" that may or may not be important. These finding can lead to more testing that may or may not be necessary.
Before going ahead with screening, I would recommend getting a detailed description of the testing, along with what specifically is being looked for. I would also inquire as to whether or not you have access to a health care professional that can help interpret potential "incidental findings."