Not bad is very close to the original HL 1 map Tho some minor details are left out. Like the office room with the scientist next to the elevator is not the same as in HL1. The water office room is missing some details like cabinets & the sink. The vents were the fan is is also wrong. The fan their is vertical IE from top down you would only see the top of the fan. their should also be a dead security guy in there with some headcrabs. The gray hallways are also off as in HL1 they are multi story administration office complex. IE 2-4 floors with stairs. I would have made just the 1st floor their with teleports on the stairs to the higher floors. The hallway out side of the elevator is also missing the hanging electrical cables & the table. The water room is also missing the hanging electrical cables.
All in all its a good Half Life like map but not a complete replica of the original.