SleepCover update:
- I'd ordered it nearly 2 weeks ago, it was shipped yesterday and arrived today. So apparently, Kobo.de has them in stock now.
- I expected a lot from it since at 50 EUR it's far from cheap.
The good
- It fits the reader well and doesn't add much bulk.
- It feels expensive and durable (ask me again in 2-3 years).
- It wakes up the device and puts it back to sleep (duh).
- With the flap it can stand on the table. It's a bit hard to do the first time because the flap is somewhat stiff but the crease loosens up a bit if you force it slightly.
The bad
- Occasional (very rare) ghost touches: it seems like putting the device to sleep takes a sec longer so it might still register a touch after closing it (I hate touch screens on eReaders, what I wouldn't give for a non-touch device with hardware buttons like the old Kindles). This leads to it skipping a page back or forward, or to highlight a random word (that remains visible on the sleep screen: ugly). This really sucks. The Kindle PW2, well, its cover (after 3y and hundreds of books still in good condition) never does that.
Conclusion: I'll still use it and I hope they can fix the ghost touches upon close at some point (or maybe we'll get one of those oh-so-useful patches for this

). I'm used to having a reader with a cover, I use it to hold the device one handed while reading in bed.
Regarding fonts:
Now that I enabled the “Freedom to advanced fonts control” patch I can tweak Bookerly a bit too, making it somewhat thicker. IMO, this makes it more readable on the KA1 and puts it in my top two fonts list (the other one being Charis SIL ModifiedLarger).