This apartment is spacious, cozy, and clean. It also has a great location, with the Charles Bridge a 20-minute walk away. As others have mentioned, the shower situation may prove to be difficult. My boyfriend had some issues showering since he's tall, but since I'm short I had no problem. Just something to be aware of. The wifi is also pretty fast, which is great!
We did hit a few snags, however. You may have to pick the keys up from his bookstore (like we had to), which will add another 10-15 minutes to your taxi trip. If you choose a good taxi company (such as AAA, which he recommended), it will still be a reasonable price. Secondly, and this was more of an issue, as we were getting ready to check out (around 11:50am), another couple walked in to the apartment with another set of keys. They were checking in that day and had arrived early to drop off their bags. Not a pleasant surprise for either of us, but thankfully with some communication we resolved it. If you choose this place, you may have to initiate more complete communication.