We bought a wooden playset from Toys R Us during one of their sales. They always have 1-2 of them on sale every week this time of year. They have half a dozen or so styles (and range of prices) for the Sierra playsets. I don't remember exactly but I think we paid $600 or $700 for it (on sale, comparable set was over $1500 at other places). It came in 2 large boxes that fit in the back of our SUV (stuck out the end about 4 inches). We took it home and my dad and husband had it built and set up ready for kids to play on in a Saturday afternoon. That was almost 6 years ago.
It's sturdy. Every spring my husband will go out to tighten anything that might have worked loose but nothing has. The awning is still in great condition and has survived our winter and spring storms. The wood has faded just very slightly but we've never sealed or sprayed it with anything. It still looks great. We've customized it a bit... added a plastic steering wheel and pirate spyglass from Lowe's, removed the hanging bar and replaced with a Little Tykes toddler swing. We already had a red plastic crab sandbox (with lid) and that fits perfectly in the 'sand box' area underneath the playhouse area.
We have 3 children that play on it almost everyday. We also have tons of neighborhood kids over all the time (apparently we're the hangout house - which I don't mind at all) and it's not unusual to see 5-8 kids on it at once. My teenage neices and nephews (some the size of adults) play on it, too and it holds up well.
My son was 2 when we bought it and could do everything himself right away except the monkey bars and the 'big kid' swing (he could get on/off and do the 2 person glider, though).