SPP Harvester by OnMarket, page-634

The 26th is the next business day but is also ANZAC Day holiday in some places.
The comment re the allocation is not that dissimilar to IB, if you can sell by the 30th I'd say the service is on par based on the average for the SPP Harvester.
Anything less than the 30th is an improvement IMO, don't forget there is a 1 day lag to be able to sell the shares on IB after allocation to accounts + sometimes it took multiple days to sell.

I'd be happy to go with IG vs IB if you can sell within 5 business days of shares being issued based on a par service but massively reduced brokerage.

Good that you got the email the day after despatching the booklet, similar to OnMarket.
So far so good I'd say.