I live in Sale.
Childcare is widely available here. Plenty of Nurseries, Playgroups, Childminders. Wraparound clubs for Primary are particularly good. There are plenty of holiday schemes and clubs too but it all stops at end of Year 6 there is almost nothing for year 7's and above.
Sale is friendly and busy, possibly a bit vanilla, but a good place to live. Lots of parks and green space, restaurants, cafes, run of the mill shops, good schools (but beware the Grammar school circus), good access to motorways, great public transport links, leisure centre, sports clubs, kids activities, active churches, etc.
Schools are oversubscribed for most years, so families moving in to the area may struggle to get places for all their children at the same school initially. People come to Trafford for the Grammar Schools and it can all get a bit crazy coming up to 11+ time. IME Most kids have tutors regardless of how likely they are to pass, or whether Grammar is a good fit for them. Don't disregard the local High Schools, they're all good, but all very different. Figure out what your child needs from a school then find one to fit.
No market in Sale, but the nearby one in Altrincham is famous. However, it is a bit fancypants, and not my cup of tea. The Charity shops of Trafford are fab though. Lots of great bargains to be had wherever you go.
Sale shops are uninspiring really, but there are some nice cafes, an amazing fish shop, some surprising furniture shops, 2 pottery painting studios, and a handful of clothes shops. It's not often you can't get what you need, and Manchester City Centre and The Trafford Centre are only 20 mins away.
The local Leisure centre is a bit grim in that it is old and in much need of renovation. That said, there is a well regarded swimming club there plus an extensive set of clubs, classes and facilities at very reasonable prices. There are also a couple of Gyms, DW Fitness and LA Fitness (or similar). Nothing too fancy, you have to go to Hale or Trafford Park for that.
There is a strong sense of community within Sale, particularly Sale Moor at the moment, with groups such a We Are Sale Moor and Friends of Walkden Gardens holding community arts events.
What else?
The Canal, water park and Transpennine trail offer good walking and biking routes. It's possible to commute by bike to many neighbouring towns.
Trafford Music Service offers fantastic music tuition to school aged children. There are lots of private music teachers around too.
lots of Brownies, guides, beavers, cubs, Scouts, Gang Show, young leaders groups etc
The only thing I don't like here (other than the lack of a beach) is the traffic. Pick your school run and work commute very carefully and go by foot if you can. And bear in mind that Sale is sliced in half by Washway / Chester Road, with Ashton on Mersey on one side and Sale Moor on the other. It is sometimes a very physical barrier that can be a pita to negotiate. Also politically different as Sale East is a Labour seat and Sale west Conservative.
Oh yeah, and house prices are stupidly high with good family rentals difficult to find and keep.