Martin's place is brilliant. Once you're in (the check-in is absolutely idiot-proof, even I couldn't muddle it up!), you'll find an extremely cosy yet still spacious room. Everything is clean and the bathroom is just huge, which definitely took me by surprise.
The location is just perfect, 5 mins away from Palladium, where you can buy pretty much *anything* you need, 20 mins away from Charles' Bridge and 10 mins away from Úan Florenc if you arrive by bus (a bit longer if you arrive by train but not that much more), honestly I can't really think of such a good location, it's an absolute bargain.
Martin was extremely kind and even gave me some advice on places to take photos from, which I definitely appreciated quite a bit.
Honestly, if you're going to Prague and looking for a place to stay, this is definitely it.