Agree with the poster who said the major con, pun intended, of Dunshaughlin is Super Valu. Definitely not super value. Horrendously expensive, as happens in monopoly situations. There was a petition to bring Lidl into the area a couple of years ago but certain businesses (ahem) objected. You can nip over to the Tesco Express in Ratoath 6km away or, if you love traffic, head into Blanch 15 km away. Navan is 15km the other way and has more character to it (think of that accent!). Ashbourne (beyond Ratoath), is 14km from Dunshaughlin, and has Tesco, Dunnes, Aldi & Lidl.
To my consistent surprise, it's very hard to find a house in Dunshaughlin. A quick check on Myhome and there is only a handful of them, and less than a handful are in a 1km radius of the actual village. For instance, one detached house listed as "Hallstown, Dunshaughlin" is some 6km from the village, nearer Ratoath than Dunshaughlin. The house in Branstown is about 5km down the Bog Road (lovely road). I'd avoid Grange Hall (on the village side of the Bog Road) as it has to be among the most ugly developments on this entire island. It defies belief that planning permission was ever given for it. Watching it was a real, collective "WTF" moment for the entire village.
Other than that, there's a very strong GAA club (it got to the Leinster Finals a few years ago, where IIRC Rathnew of Wicklow beat them) undergoing huge redevelopment. There are soccer, tennis and golf clubs also, with the Jack Nichlaus designed Killeen Castle some 4km out the Killeen/Dunsany Road (lovely road also).
Schoolwise, Scoil na Rithe (the Gaelscoil) has a massive reputation (like most of the village improvements, it was outsiders who set it up - in this case in a prefab in the old Tech in 1985). Dunshaughlin Community College is at the very top of the VEC schools in Ireland as it is one of the 12 schools in the state chosen by Microsoft as its "schools of the future" and is therefore in receipt of exceptional funding for technology.