My father dies in the second half of October. By the end of November, having acquire probate personally, I'd completed everything that was needed, transferred everything into my name (as I was both sole executor and sole beneficiary) and was driving around in a car purchased from my inheritance. The whole thing was incredibly simple and I found the local Probate Registry staff to be exceptionally helpful.
That was back in the days before one could apply for probate online which, from reading posts on previous threads here, now seems to be even simpler.
While the company that you mention might be of some assistance to your friend, they would almost certainly still need to do much of the work on their own anyway, such as contacting pension providers, banks and other financial institution to establish the assets of the deceased person, as well as getting valuations on any properties that they might own.