Overall we had a very enjoyable stay at the Pley Hotel. The room was spacious and in good condition, as well as being very clean indeed. The staff were universally friendly and helpful, and spoke excellent English which was helpful when our French language skills ran out! It's also in a convenient location for exploring all that Paris has to offer, with many places within walking distance, or accessible via the RER and/or Metro. We visited Disneyland for a day and it was less than an hour 'door to door'.
The only slight disappointment was that there was an event going on in the bar on the evening of our arrival, with loud music until just after 23:30. With our room being just above the bar area, it was pretty loud and I suspect we would've been unable to sleep had we gone to bed earlier. I understand that hotels do often have events on, but it would have been nice to know this in advance, and maybe also what time the music was due to stop.
The positives far outweigh this, however, and I wouldn't hesitate to book the Pley Hotel again.