I used to read these posts daily.
is it working so well? 
Where is everyone?
PANface Mine is working swimmingly. WW sends many commands each day following a complex Agile schedule of charges, holds and discharges with a better than 90% command success rate. Occasionally misses a command due to the inverter being offline which, other than extending the retries to 2 minutes, WW cannot do anything about.
I'm still here, and I check in on a daily basis. Everything is ticking along nicely so I've not needed to post asking for help or advice.
Perhaps there should be a "Wonder Watt Social " forum where people can discuss various aspects of their set ups / ask advice etc.?
WW is working great for me. Since I finally got Home Assistant running five months ago, I am currently using a combination of WW and HA to run my kit. Over time I am improving my HA rules, so am using WW less and less. It's a great backup though, and I have it working in harmony with HA.
Back in October I paid for a year's subs to WW. I don't regret that in any way. Would I renew my subs this October? I'll have to make that decision nearer the time as it will depend on how much I've improved my HA rules.
My HA rules are currently quite clunky, and I haven't worked out how to validate that a command has got through to the inverter, so I run any important rules several times to allow for inverter dropouts.
With regard to HA, I did ponder going along the Raspberry Pi route as I do/did like to tinker. ( far less so nowadays as the years have rolled over and there's grandchildren to occupy my time ).
If I understand it correctly WW are planning to gradually introduce more automations / options. Hopefully they will arrive at some " Predbat " like functionality at some stage.
PANface in a word, "yes". 99.1% off-peak on IOG for Feb .... need a bigger inverter really.
The best I'd achieved before WW was 98%, which involved a lot of faff, and was also prior to us having an ASHP.
In addition, I'm exporting proportionally more with the automated conditional schedules, upwards of 90% battery utilisation every day, so the batteries are earning their ROI, rather than just looking nice and being heavy.
Still here. Nothing going wrong with WW. Some interesting Agile days where late morning/early afternoon is cheaper than overnight.
My experience has been good. Problems have been quickly resolved.
I carefully monitor my system daily and very occasionally make changes to the suggested schedule if my pattern of usage alters. On rare occasions when there are lots of sub 10p slots I will engineer exports.
The real hiccups have always surrounded clock changes which WW does not seem to handle well. Other than this I can rely on WW to select suitable daily slots.
I read this forum every week and it has helped me to understand how best to deploy WW. The cost of under £1 weekly is good value for the time it saves for Agile users.
Whilst there is general guidance on how to a system up and going a User Guide would be useful particularly for new users. It could suggest best practice (eg safe time intervals between instructions and how to safely cancel instructions).
Carry on the good work