I thought I'd best report back - after all the assistance that I've been given from this thread in the lead up. Has taken a few days as time hasnt permitted me to do this earlier.
Suites was put simply, unreal. The comfort level was much higher for me than expected, but the service went through the roof. Seriously impressed and a serious jump compared to J! And I now understand the Krug vs Dom - Krug all the way!! Plus, caviar... *drools*
We did have a minor (and when I say minor, I mean incredibly minor) buzzing noise in our headphones on the SIN-MEL leg, which the main hostess attempted to fix repeatedly and was really apologetic. Had I been anywhere else but first class, I would have ignored it, but I thought it was worth a question to see if they could fix it (my seat had a minor fault with reclining on the ZRH-SIN leg, which was very quickly fixed, so I thought it might be as easy as that was).
When she couldnt fix it, she offered to move us from 3C/D to 3A & 4A which were the only suites vacant, but Mrs wasnt overly keen on that so we stayed put. At the end of the flight, the main hostess came up and provided us with a SGD $200 voucher each for use inflight on our next Singapore flight as an apology for the headphones issue. We were really surprised and said it wasnt significant enough to justify that - but she insisted we accept them and really wouldnt take no for an answer. Luckily we've got another trip already booked with SQ in F for April, so that will be put to good use!
All in all, Suites was an awesome experience. Would I fly it again? Absolutely - but only on a day flight to maximise everything about it. I personally dont see a great benefit to me over business class if a night flight, given the points increase. That said, if there was no J and only F available... I'd not hold back!
Thanks heaps to everyone in this thread who has contributed to our experience with knowledge. We look forward to my SQ F trip in April (777), then its an SQ hiatus for us as we plan MEL-TYO-HNL-MEL for April 2018 (should be CX J/UA F/HA J if all goes to plan). I'm actually very nervous about flying anything else than SQ J/F - I can only hope it stacks up reasonably in comparison!!