@PinchOfSalt Let's start with the pros and cons although I believe most would be aware
Pros
* Guarantees that the required amount will be raised
* Gives confidence to retail investors that the raise is fully supported
* Company can concentrate more on running the business while the underwriter assists in raising the required funds with existing and potential shareholders.
Cons
* Underwriter fees so more costly as you pointed out.
* Company effort and labour in attracting funds themselves means management has less time on running the business during the period.
Also it is debatable whether the underwriter will sell immediately for a quick profit after the raise as I don't think there is much discount compared to an IPO where there could be hidden options and escrow shares lurking in the background.
Personally I would like the reassurance of an underwriter especially when company performance or management has been questionable as in this case Impedimed. But sometimes even the underwriter or lead manager gets it wrong.
I think IPD did quite well here. I have seen some raises with no underwriter that did not raise the required amount. Alkane Resources on the Boda discovery comes to mind.
On another note, Bill Beament's Develop has done a few raises and they have been all underwritten even given his track record. Personally I would participate in any Beament raise - underwritten or not - but I am digressing yet again.
Here in IPD I'm not so sure given the long term performance and the amount of trapped holders at 1.50 more than 5 years ago.

However the sudden injection and energy in the potential applications for their main product is a refreshing change.
To be fair, I probably should have done a Damodaran real option valuation like what I did with AMI but it takes more time to do.