To its credit, Entrepreneurial Spark felt like a breath of fresh air when it was launched in November 2011 with a positive message and high profile backers.
The idea of several diverse entrepreneurs sitting next to each other and bouncing ideas around appeared ripe with possibility. Since then it has seen notable successes such as healthy pizza company Eat Balanced and life sciences firm Taragenyx.
While it appeared to champion openness and transparency, concerns have now been raised over its practices.
Stopping participants from "engaging in negative media" seems regressive and surely stops a vital mode of assessment for the success of the organisation.
It would be amazing - and statistically unlikely - if every company going into E-Spark went on to be a success. That's not to say the programme it is running is flawed.
Start-ups fail for all sorts of reasons but regular open and frank feedback from participants before, during and after their spell should be an essential part of any business incubator.
If the dialogue between those running the incubator and those in charge of the companies breaks down then it is questionable how such an organisation can adapt to the differing industries which may come through its doors.
E-Spark has done a lot of commendable things so far and we hope it can continue to give valuable support to entrepreneurs for many years to come.