I had been putting off getting a house cleaning service for too long and, as a bachelor, you know how things in a large house tend to become...unkempt. The initial medium of using a Groupon was great, but what really appealed to me was that their website allowed you to not only go in and schedule your next appointment, but set up a recurring one for however long you think it'd take to get your place dirty again.
The first time the person had far more to clean than the 3 hours allowed for, and instead of just stopping and bolting, asked if I wanted to extend my time to get through some last bits. Granted, extra time had already been put in so she could tackle the pit of despair the was my oven, but I went for an extra hour to get more done because both the wok done was great and I had gotten the membership deal where each hour was $5 less.
All said, I've had them come out twice and I see this place working out as a regular cleaning service for me. Easy to use and great people working there.