翻译：令我们感到高兴的是，到目前为止，没有顾客抱怨我们旅馆的服务。(complain about)

问题描述：

问题解答：

What makes us delighted is that no customers has complained about our service so far

to our joy,there is no complain about our service so far

it's very delightful to know that no clients has been complained about our service so far

What makes us delighted is that no customers has complained our service till now