Our extended family (2 families - 4 adults and 8 offspring) had a really great 2 weeks staying at Villa Lappa. The location was brilliant - in really easy reach of the main spine road that is along the North side of the island, but also centrally located, so most parts are easily reached in a day. It's in a peaceful location (other than the dogs in surrounding houses who can become a little boring with their barking), and has a lovely view of the sea, which also brings the added bonus of a gentle sea breeze on the hot days. I would say that, although there are several good tavernas and a shop in walking distance, you do want to have a hire car for the duration of your stay, unless you intend to spend your whole time by the pool. The beach is an hours walk away, so doable, but it would be on a busy road and uphill on the way back - also the nearest beach is on the north coast, which is beautiful, but doesn't match up to the splendour of the south side of the island, which would be a shame to miss out on.
Communication with the guys at DisCrete villas was really great, and the maid service mid week felt like a luxury. The villa was sparkling clean when we arrived, and having it kept clean and tidy through the stay was really appreciated.
The pool is a great addition, and a good size even with 12 of us staying there. The olive grove is beautiful and the grounds have numerous fruit trees, which we were lucky enough to get some goodies from - figs and peaches straight from the tree are heaven!
The only downside of the villa was the equipment in the kitchen. To give some context, the villa is actually designed as though it's 2 apartments, so there is a kitchen and sitting room on both floors, but as we were a party of 12, we only really used one of the communal areas, however, despite raiding the other kitchen for equipment and crockery etc we found it was poorly stocked - no can opener, only 3 (not very) sharp knives and 1 chopping board, just to give an example. It wasn't all bad though - great to have a washing machine, dishwasher etc, and we had a very fun night trying to cook pizzas in the pizza oven near the pool (another handy note is that the stuff that looks like frozen pizza dough in the supermarket isn't pizza dough, it's pastry!).
I would highly recommend the villa if you are a large party who want a comfortable, clean place to stay that is in easy reach of the other areas of Crete.