Came here with my extended family in April 2015.
OK I'm going to start with the bad and then finish on the good, as they outweigh the bad points and its a better way to finish.
Bad - Communication from the owners was non-existent before arriving, could not get them on the phone and couldn't get them to respond to messages left, ended up just turning up on the day and hoping for the best. If we didn't need a key code to get the keys a key code for the gate and a code for the wifi this wouldn't even be an issue, but as we did it was (please note this only really had an impact on me and my wife as we arranged the cottage, the other guests had no part of this so had nothing bad to say about it)
Second bad point, the gate to the cottage is keep locked by a padlock and chain so getting out of the car, unlocking the gate, driving in, getting out and locking it again then driving down to the cottage is a pain. I understand why its there (it is a working stables) but its not a great system (older people or those with disabilities/mobility issues might find this a massive pain).
That's it, those are the bad points done. I have absolutely nothing else bad to say about this place whatsoever.
Decor, lovely, modern but inviting, all the mod cons you could really need; wifi worked fine, full central heating, amazing showers/en suites in all rooms, two batch for those who need them. Kids are well provided for with a travel cot, linen, a high chair, cutlery etc and a bunch of toys that have been left there probably from the owners kids (but absolutley fine for a toddler to get engrossed in).
All the bedrooms are spacious, all have comfy beds, clean linen, towels, lots of wardrobe/drawer space.
The dining area is huge and comfy and the lounge area is spacious with comfy sofas.
Kitchen is fully equipped (including a dishwasher and washer dryer) not sure there was anything we though it needed that was missing, and there is a cage for a dog assuming you have an unruly one that needs it.
Outside is a decking area for sunny days a small bbq area and a pool table under a shelter. Plenty of parking and the surroundings are very pleasant.
Just far enough away from civilization to be quiet but about a 15 mi drive to Ashbourne for supplies.
Should you stay here, yep I think so, it's lovely and the moan at the beginning was probably a one off, I certainly do not think it warrants missing out on this lovely holiday cottage.