Stayed here for four days in June as a family (three young children). The apartment is large - five functional bed rooms, two sitting rooms, and a kitchen. It felt a bit run down, particularly the bathrooms. It is not recently renovated.
The location on paper is great - directly across from Athlone castle. However it is also directly next to several very active pubs (including Sean’s Bar) mobbed with stag parties, so the noise was loud until well past midnight for Thursday through Saturday nights.
Eoin and Ann were helpful and communicative, no complaints at all.
I think this is an idea place maybe for a stag party or a group of young friends, but given the location and state of the flat I wouldn’t recommend it to travelers with kids.