With a price tag in the low £20s for the pair i was skeptical, but this is only being purchased as a stopgap so the price was just right. The keyboard does not feel cheap at all, no rattle and attention to detail such as rubber strips on the tilting feet and nice plastic with an understated look - the keyboard stays firmly put even under my heady handed typing. The action of the keys is good (for a membrane keyboard), and not overly squishy, and the keys have minimal wobble - nice. The mouse is acceptable also, clicking action is tight and firm, no loose clacking, and it lies perfectly flat. the scroll wheel has friction/indents, which i **much** prefer over the horrible free spinning type. I'm an 'experienced' gamer, and playing some Team Fortress 2 i am still happily making top of the scoreboard using this wireless desktop set. It comes with good brand GP alkaline batteries also, but i've replaced them with GP recyko (much like sanyo eneloop, etc). The dongle is small and stays out of the way, but with windows 7 is 100% plug and play, took 5 seconds to get working.
The keyboard also has 128bit encryption.
This is my first day of ownership so i cannot vouch for reliability, but build quality doesn't look to be an issue, i'm actually pleasantly surprised.
5*, because for the price it is very good value, and definitely recommended.
edit: still good almost a year on, though it's on backup to my steelseries xai/6gv2 setup now.