The first thing I'd say is don't believe the overwhelmingly positive reviews. PB complain about negative reviews and insist that they are taken down by the review sites. The reviewer then has to provide proof to the review site that they are a legitimate PB customer. Many don't bother, so the negative reviews stay disproportionately low.
Our experience:
Terrible photos. When we asked for better ones to be done, we were told they didn't provide a professional photo service. We used our own photos in the end.
Badly written blurb. I rewrote it.
Sign put up on someone else's land after I'd specifically said not to put it there (difficult neighbour). We moved it ourselves.
Location was somehow wrongly put into Rightmove so if you put our village into the search engine, our house didn't come up. This was never put right.
No contact at all once we were on the market. I had to contact them to suggest a price drop as I felt they had over valued. The price was dropped and we ended up with 2 parties both wanting the house within days.
We were left to do all the negotiating. The EA checked the buyers were in a position to proceed, that was it. We never heard from EA again.
EA was impossible to get hold of. Voicemail was full and emails went unanswered.
If you are a confident experienced vendor, it's a cheap way to sell your house. We were, so were able to make the key decisions along the way. If not, and you aren't lucky enough to get one of their more engaged agents, I'd steer clear.