Not many teams leave Ravenhill with a win, but the second-string Ospreys muscled their way to a 20-12 victory that Holley says is a turning point in their season.
"We didn't start the season well, probably because we were in a new home and we had a lot of injuries to key players, but I think you've seen the real Ospreys in the last couple of weeks," he said. "The win in Ulster was brilliant - we had about a dozen players missing, but the other guys really dug deep. Not many teams will win in Ulster this season and it was a very nice feeling to return with the points."
Holley said the defending champions had no intention of taking their hands off the Celtic League trophy just yet.
"We're about sixth on the table and I think a lot of the top teams will take points off each other. And looking at the draw, about seven of our last 10 games are at home. We know we can't afford to lose too many more games, but it's a bit early to write us off just yet.
"Our next game is the Powergen Cup match against Bristol on December 2, and - touch wood - we should have a full compliment of players back by then. The likes of Gavin Henson and Ryan Jones are targeting that match, and I don't think many teams will be looking forward to playing us when all our players are fit."
Outside-half Shaun Connor - who is enjoying the best season of his career - was again the Ospreys' hero on Friday night. He slotted four penalty goals and a clever dropped goal to compliment the effort of scrum-half Jason Spice, who scored the only try of a hard-fought match.
Meet the members of the WRU's inaugural Youth Board - after an online selection process which saw a host of high calibre candidates submit video applications the WRU has made its first 15 appointments.The board is made up of individuals aged between 16 and 21, and will meet for the first time at Principality Stadium on Monday 15th February.
The Wales Women's team headed to Dare Valley Country Park on a team bonding exercise as the entire squad got together for the very first time in preparation for this season's Six Nations championship which kicks off on Saturday with a clash against defending champions Ireland, in Donnybrook.
Wales Head Coach Warren Gatland discusses his team selection for the opening round of the RBS 6 Nations where he leads his side against Ireland, on Sunday. As WRU TV's Luke Brodley discovers, Gatland is fully aware of the challenges the defending champions pose
WRUTV caught up with Wales Women captain Rachel Taylor at the RBS 6 Nations launch and how a good crowd really helps boost the girls performance. Tickets for all three Women's home games at The Gnoll, Neath are available from www.wru.wales/tickets