Jurby Prison has 138 cells equipped with toilets and washing facilities
Prisoners and staff have "adjusted well" to the £41.7m Isle of Man jail which opened a year ago, Home Affairs Minister Adrian Earnshaw has said.
Jurby prison has 138 single cells with toilet and washing facilities, and improved rehabilitation opportunities.
It replaced the 19th Century prison in Douglas, which had shared cells with no sanitation facilities.
The Manx prison has an annual operating budget of about £7m and the highest occupancy so far has been 124.
Mr Earnshaw said: "Prisoners and prison staff have had to adapt to a completely new environment and it's apparent that they're adjusting well.
"One of my ambitions is to reduce rates of recidivism, and this is the first brick in the wall regarding that, with the increased opportunities available."
The old prison at Victoria Road, which first received prisoners in April 1891, shut its doors for the last time on 14 August 2008.