I would have liked to read the rant. I'm assuming you've had a bad experience. I hope it wasn't with us - let me know if it was.
In answer to your question:
Are they worth the money??
Not always.
If you have a pre 85 built property with no renos and not many Assets, there might be $1,000 depreciation in the first full year, but I'm not sure it would be worth paying $6-700 for a Depreciation Schedule. Remember, when it comes to just Assets, a taxpayer can value them - the ATO's contention is that it requires no particular expertise to value, say an old stove. Give me a call Monday if you want me to explain this.
Anybody doing Depreciation Schedules should work out before they go there if it is going to be worth it for you. Lots of clients send us photos of properties and I get one of our guys to work out what might be the possible depreciation return before we take on the job. There are times when we turn down jobs.
Lots of companies don't send quantity surveyors to properties, either. I don't think that is ideal, but they tend to be cheaper.
Scott