What are the experiences and tips for obtaining an Australian tourist visa for a Thai partner?

Yes, used an agent Siam legal supplied everything they asked, FB photos over 6years, letter of invitation, a guarantee her expenses were covered,copies of my bank statements 50k plus her bank statement 13k plus , her job status, land and house details, reasons why she would return to thailand and after all that crap they said no it was declined, they stated ,this is there words I HIGHLY DOUBT YOUR IN A RELATIONSHIP WITH MR FRAZER AND DOUBT YOU WILL RETURN SHOULD YOU BE GRANTED A VISA, I checked the immi account Siam legal had left a fair bit out, I wrote them a scathing email and the department of immigration in Bangkok, Siam legal resubmitted it for free a second time and it was approved 3 weeks later. So it can be challenging , supply as much information as you can and even more if possible, but in saying this it does depend on who is reading your application and whether there in a good mood or not, the whole experience was laughable.

Key visa duck square opposite big C Pattaya Thai..used them in the past great service..or Trendy house British passport soi 13 sukmvit road Bangkok did my daughter's renewal there much cheaper than a agent...

Yes

Applied online in Thailand, flew to Bangkok did biometrics, before we went to sleep had the approval grant by email

Use an sgent Paul King easy visa pattaya

Tried twice , couldn't & gave up !

If she has a job

House

Life to come back to in Thailand it's easy

You need to prove your relationship and the legitimacy.

Best way is fb photos screenshots with dates.

She will need to get her biometrics done in Bangkok.

You need to provide proof of financial stability or she needs to provide proof of funds.

If its a legit relationship that's been built over time, you'll have no problems.

If not get a agent.