Exclusiva Civa wins this one hands down folks and fellow travellers. All I have to say is you can take the bus between Lima and Mancora 16hrs. 2 ways.
Exclusiva aka Civa bus lines is my top rated means of travel in Peru. They offer brand new mercedes motor coaches with plush leather seats with private area and 3 times the room of any other bus line in peru. The tickets are only $10 usd more for this service compared to the nasty economy seating provided by cruz del sur aka curse del sur. Civa gets my only 5 star bus line rating.
Cruz del Sur is the worst bus line I have ever taken and let me just say that the even tried to rip me off at the ticket counter. I tried them once and will never go back. I wouldnt have even tried had the Civa bus been booked solid. I took the terrible ride from Mancora back to Lima a few months ago which you can read about in a previous post here at mochileros peru. Cruz del sur gets a rating of Zero. Terrible exprience I wish I could forget.