Gants Hill is fine, if you're looking to buy it depends on what kind of property/vibe you're looking for. I know the south side of the station really well, it still feels like London to me, up towards Barkingside and over in north Redbridge feel more suburban.
The Garden City Estate next to Valentines Park is the best area (Holcombe, Emmerson etc). Houses don't come up for sale that often, there are some big Edwardian semis and some Arts and Crafts style houses. Valentines Park is right next door.
The triangle of 'Gardens' - Redcliffe, Ranelagh, Vaughan etc, between The Drive and Cranbrook Road are big Edwardian terraces with cast iron balconies - these houses are good value imho.
The Cathedral Estate is also nice, it feels a bit more suburban as it's mostly extended semi detached properties with driveways and big gardens.
I wouldn't touch anything south of Beaufort Gardens and nothing west of The Drive that isn't on the Cathedral Estate. There are some big double fronted houses west of The Drive (Kensington, De Vere etc) but a lot have been converted to flats and are rentals.
I've lived locally for 8 years and the demographic has started to change slightly. It was a desolate land of chicken shops and nail bars when we came here. The area around the station is changing, there are more restaurants, more people around in the evening eating out. Due to the demographic there are not a lot of bars/pubs, unless you fancy a night out in Faces 
We came from Walthamstow and saw a similar pattern there. We're getting hand written letters asking if we'd consider selling and Foxtons are sniffing about 