We've used Daydreams (formerly, Maui Playcare) for a couple of years. It's great for quick appts when I don't want to bring the kids. They literally charge to the minute. So, you aren't rounding up like you might with your sitter. My kids always have a great time. It can get pricey if all 3 are there for the 4 hr max (and I give them permission to buy snacks). But, they often send coupons (get on their email list) and you can bring in your own food.
We've had periods when we haven't gone for 5 or 6 months and they know my kids by name when we walk in. Impressive!