Stayed at Sunraysia resort in late June, 2012 for 7 nights with Family.
This is not a 5-star resort, but is basically a timeshare based resort. So if you're looking for the concierge, room service or nightly turndown it's probably best to look elsewhere.
As the timeshare based resort though it really is up with the best.
Villas are clean, a little dated, but spacious, neat and everything works or is fixed promptly.
The grounds are excellent - neat, tropical, lots of picnic areas and barbecues etc.
The facilities are also first class for families. Multiple pool/spa options, mini golf, tennis and regular organised activities for kids and grown ups. I've been bringing my family here on and off from the time they were little to now been grown up and I've never had the "I'm bored" thing. Very rare as most families with young kids will know. My grown up kids still regaularly tag along (although I suspect the Mildura Brewery rather than the mini-golf is now the attraction).
The on-site restauarant serves the basic (what I'd expect in a pub) things, but it is a nice dining area and very good value (also something important for families), especially at lunchtime.
I use Sunraysia Resort regularly as a winter getaway and Mildura is a great place for that. Not hot, but middling temperatures and usually sunny almost every day.
In short, I'd really recommend this for families looking for a break where the kids can be kept busy and activites and meals and things can be minised cost-wise.