Ya, ive used them a bit over the last 4 years and havent had much friction in regards to oversized bags
They used to have a 25kg limit but have recently reduced it to 20kg
Leaving NZ going to BKK they pretty much let you take what you have without any penaty fee's but have now seemed more pre-occupied with charging for "sports equipment" leaving BKK so be aware
The last time i had to open my kitebag and let them see if i had anything but i leave my clothes on top to aviod any unpleasant repercussions and they let me thru ok