Irish have now won four games from five without setting the Aviva Premiership alight and Booth commended his side for their determination.
But despite making such a promising start to the season, the Exiles boss is now challenging his players to start putting in the performances that justify their tag as league-leaders.
"We won ugly and we will take that," said Booth. "It was a very slow start without question and we felt our way into the game but I was confident that over a full 80 minutes we would be successful.
"It was a workmanlike performance with no glitz or glamour and we are satisfied but not happy with our overall performance.
"If it was a school report after the first quarter I would describe it as very good. However we haven't played fantastically and there is much to improve."