I stayed here for five days, and where to start? :)
1) Location: okay, let's just say this, because no host (no matter how good) would advertise this fact, but it's like 200 meters from a towering yellow prison. That out of the way, should that deter you? No. First off, from the cottage, it's only visible if you *try* to see it, and only barely, through one window; the rest of the scenery is lovely and rustic, a very old-world aesthetic. Secondly, the odds that while you're there, there's going to be a prison break, *and* the prisoners are going to choose to hide out in your cottage *right near the prison*? Yeah, that should be on your Czech-vacation-concern-list somewhere between "eyes gouged out by a falcon" and "shark attack" ;) Honestly, it's probably great to have the extra security around.
Apart from that: it's close to the airport, but not so close you get any noise from it. Great distance - something like 10 minutesd drive by car or 2 hours walk. It's quite far from the centre of town, but Prague has good public transit options if you want that.
2) The building: The pictures are fair. It's quaint and rustic. Soňa put a lot of care into little details travelers might have forgotten - the more you look around, the more things you see that she thought to add in case people needed them (power adapters, chargers, toiletries, on and on). The cottage was kept quite clean (though, of course, rustic). It's fully detached, so if you're COVID-concerned, no worries, you're not staying in a shared building.
All in all, quite a nice place to stay. That said, a few caveats:
A) The hot water is only enough to fill 1/4th to 1/3rd of a bath before it runs out. You basically can only sit in a puddle. With some work you can sort of extend it with multiple kettles of boiling water and may get up to 1/3rd to 1/2 bath, but that's it. Still, it's manageable. Otherwise you can shower.
B) Some people like firm beds, others soft. This bed is very firm. That said, I was so tired each night I slept generally fine - just a bit sore in the morning.
C) You can't change the temperature inside (apart from opening doors / windows). I found it fine, though maybe a tad cool. Not really a problem though.
D) Only two of the three windows have blinds, and the blinds only block half the light. Don't expect darkness when the sun is shining.
Those are really the only negatives I can think of. The kitchenette is great to have.
3) The host: If you're looking for a really "active", see-you-every-day host, Soňa (pronounced like Sonya) is not for you. That said, whenever I needed anything (such as reservation extensions) or had any questions for her, she always helped out. At one point I asked for a food delivery website, and she not only provided a great one, but later followed up to make sure I was able to get food and that I enjoyed it. :) Nice person. A couple caveats:
Pre-arrival communications were kind of subpar. I wanted to rent an electric car, as I'm used to driving one, but she said no to charging it there. She seemed concerned about the cost of charging it, and even after I offered to pay for all the electricity she seemed hesitant. So I got an ICE rental instead, and due to my lack of familiarity, ended up putting diesel in the petrol tank at one point and causing €400 in damages, left stuck freezing on the side of the road in January for three hours :( That part is in no way Soňa's fault, but... it was never clear what exactly the issue was. She did really seem concerned about money - not just talking about how expensive her electricity bills are (might explain the small water heater tank... it's electric), but also seemed really in a rush to get paid on AirB&B, sending me a note asking to pay when I paid literally as fast as AirB&B gave me the option to.
Don't overinterpret this; these things are really minor. Again, I like her, and overall would consider her a great host, and would definitely recommend her place!
Another communication issue that should be mentioned was with her mother. As mentioned, at one point, I asked Soňa where I could order food delivered from local restaurants to be dropped off, as I didn't want to dine inside due to COVID, and she helped me out. So I order food and check the box for "touchless delivery" so they just leave it at your doorstep (also saves me from an awkward conversation with a driver who probably doesn't speak English). I'm watching the tracker tick down, and it says around 5 minutes left. Suddenly Soňa's mother knocks at the cottage (I'm guessing Soňa wasn't at home), kind of aggressively.
"Did you order something? There's food here for you."
"Oh, yes, thank you. I'll get it in a minute." I start putting shoes on.
(10 second pause, then more knocking, and sounding increasingly upset)
"Are you in quarantine or something? Your food is here."
"I know, I'll get it in just a moment. Thank you for letting me know."
(10 second pause, then more increasingly-upset knocking)
"This is not room service, you know! I'm not getting it for you!"
"Please, I don't want you to do anything! Please, do nothing!"
She leaves, apparently upset; I finish getting my shoes on, go out, and the delivery person has my food. I just point at the ground, and like in the instructions, they just set it down and drive off.
But then after this event, Soňa kindly thought to ask me if I was able to order something and whether it was good. So it just feels like there was some sort of communications breakdown