I just dived with them earlier this month (Nov 16).
They actually have 3 dive centres, in Tulamben, Lembongan, and Menjangan. I dived with them at Menjangan.
Overall, I would say that for the price you'll pay, you certainly got the best deal.
In Menjangan, the owner Nicholas, french guy, is a very nice guy. He speaks Bahasa fluently (as I'm Indonesian as well) and I felt pretty much like home. Most of their guest are french speaking Europeans.
The divemasters are pretty knowledgeable of the sites at Menjangan and Pemuteran. They have sets of BCD and Regulators (Aqualung wave). They look pretty old but still worked really well - I brought my own diving equipment, but my gf uses their BCD and reg.
The only downside was the food that they provide, less than mediocre. So I was just eating for the sake of eating (filing my stomach).
Hopefully this is helpful.