What is the general view towards Triratna Buddhism from other schools?

I've been attending a Triratna Buddhist centre for half a year now, and have learned a lot about Buddhist teachings from there. I'm curious, however, about how Triratna is seen from other schools such as Mahayana and Theravada, Zen, Tibetan Buddhism etc. In particular: 1. Is there any strong disagreement from other schools about the particulars of Sangharakshita's teachings? Or are they quite compatible? 2. Do other schools tend to regard Triratna as a serious tradition, or is the "Westernisation" of Triratna's teachings seen as a detriment? 3. Is the view of Triratna from other schools generally positive, neutral or negative?