I use Celga for all my FC matters since 2012 and never had any problems. I also already used them for tickets and getting them in time one week prior wasn't a problem.
I'm currently using them again for my Kuu concert this year.
So for me they're actually my recommendation.
And my usual contact offered me to show me her hometown as I'm currently living in Japan, which is so nice!
And actually surprising for such a quite big company to get a personal response (in a business e-mail, I was so surprised!). Guess she remembers me as I'm a good customer.