We had a comfortable stay at Days Inn Hyde Park. Staff was welcoming and friendly! They didn't seem to mind me asking for ice bucket everyday ;-)
Breakfast was way more than I expected. Toaster, wide selection of breads and spreads, hard boiled eggs, yogurt, meats and cheeses, juice, cappuccino/coffee instant machine. You don't need to go out and find a restaurant. You can have an excellent start with breakfast here.
The room was small and dark. But the cabinets make it easy to store your clothing and suitcases. Bed was comfortable and we slept well.
I also want to thank the previous reviews that steered us to use the express train from Heathrow. This saved us not only valuable time, but it was super convenient and after a long flight you just want to reach your hotel and crash. The hotel is in walking distance from Paddington station. As long as you are walking in the correct direction ;-)