This is a lovely hotel, new, clean and comfortable. Spacious rooms, comfy beds, tea & coffee facilities. 5 mins walk to the U-bahn and only 3 stops in to Dotmund City Centre (for the Christmas Markets in our case). However, booked well in advance direct with Accor Hotels for a double bedded room with roll away for our 11 yr old. Was given a room with 2 single beds, queried this with reception as had this in black and white, told the 'class' we had booked only had single beds - made us feel like cheapskates! Also, breakfast was moved from the main restaurant on sunday morning to a conference room on monday morning, toaster and fresh orange juice machine were not moved so effectively a fair part of breakfast disappeared! Hotel parking a staggering 16 euro per night, my advice - take a few spins around the block, there is free parking in the street. However, these are really just niggles, nothing that spoilt our stay but anoying from what is clearly a business hotel.

Stayed 2 nights in December primarily to visit the Christmas markets in Dortmund and nearby Essen. The hotel was very easy to find and check-in very efficient with good english spoken.
Car parking arrangements were a little sketchy - we found a space right outside the hotel but were told that we could not park there due to fire regulations - however, there was no sign indicating this and we noted the same cars parked there all evening & the following morning. The alternative was to park in the underground car park (€16 per day) or "on the street" where there are a limited number of free spaces - we did this and it seemed safe to do so.
On to the room - it was in good shape & very clean, the bathroom was a little small compared to the overall room size which was fairly large. Room overlooked the busy main road, however, it was very quiet. There was a minbar which had enough room left to use as a fridge and also tea/coffee making facilities (this was not advertised so we took our own kettle which proved unnecessary). Old style TV with limited channels. Room had a/c but was not effective as room was hot and did not cool down (public areas of hotel were at a nice temperature). We had booked a double bed with an extra bed for our daughter which they brought to the room promptly, however, we had 2 single beds. The hotel staff said this was due to the room we had booked but the confirmation clearly said a double. They did not offer to remedy this but suggested pushing the beds together (impossible as the night stand was fixed).
Breakfast was included in our rate and glad it was - as I do not feel it was worth the €19 per person it was advertised for. A good selection was on offer, however, on the 2nd morning the restaurant was closed so breakfast was set up in the conference rooms. This was ok but certain items were missing - no toaster, no fresh orange juice and so on.
Finally, location-wise we found it fine - 5 mins walk to U-bahn station (Kreuzstrasse) from which it was 3 stops to Stadtgarten or 4 to Rheinoldikirche which both put you in the centre. If you need some water or snacks etc there is a Netto store and an Aral gas station just down the street.
Despite a few niggles we were more than happy with the Pullman for the price paid and therefore am rating it very good 4/5...... Tschuss ..!

Don't be put off by the location. It is not in the centre but UBahn is excellent with normal German efficiciency. Stations are 5 mins walk (needs 1 change from Hbf) or 8 mins walk on direct line from Hbf. UBahns are every 10 mins or 15 mins in evening.
The hotel lives up to the other excellent reviews, very helpful staff and excellent buffet breakfast. Rooms are clean and very well equiped, bathroom supplies are good quality, robe and slippers provided.
There are only a few restaurants locally, we did not try the resaurant.
As for Dortmund, it exceeded our expectation for shopping abd we were fortunate enough to be there for excellent Christmas Markets; lively and friendly.
This hotel would be my first choice for a return trip.

A great hotel, nicely located for the westfalen stadion, westfallenhalle and also the city centre. quality is great and the food here is excellent. good gym/leisure facilities. we stay here regularly and will continue to do so. Staff are friendly and helpful