St Peter Port's harbour terminal has new retail and dining facilities.
Brittany Ferries has invested £100,000 in a new café, vehicle check-in area and St Peter Port Harbour's first duty-free shop.
Guernsey Ports' Commercial Development Project Manager, David Buddery, says the shop is well stocked with familiar local brands.
"Between 15% and 20% of the range is going to be local.
"We’ve got blue bottle gin, we’ve got some fudge, some local teas, and the plan is to extend the range as well."
"We're going to have the Islands Unlimited vessel, the Manche Illes vessel, potentially in the future DFDS, but this is for the people going through this terminal at the moment, which is going to see a massive increase with the Brittany Ferries sailings."
Joelle Croc, Brittany Ferries' Director of Customer Experience and Onboard Sales, says they worked quickly to improve the passenger experience.
"We were informed by Ports of Guernsey that they were opening this concession in December 2024, and of course, we decided to respond to the tender.
"It was ambitious planning because Guernsey Ports asked that we would operate by the end of May."

P&R President laments lack of progress as development agency chair resigns
Increase in youth referrals to the Guernsey Employment Trust
Hundreds of cyclists take on Guernsey's Rock to Rocque
Tickets on sale for inter-islands women’s football tournament
Person airlifted to hospital after fall on yacht near Alderney
Guernsey Planning drop in promotes extended family living
Guernsey Hospital returns to normal operating capacity days after critical incident
Premier and WSL Super League trophies on display in Guernsey