Sadly, now with dual pricing - I won't go back
Having visited recently with a family visiting us we all agreed that it was okay, but not really worth the effort of visiting. All information is in Thai, which is a shame since foreigners are charged much more than Thais, as of January this year! Some nice views and some interesting plants, but really only for hardcore botanists... It is a very large area and extremely steep in parts, so most people seem to drive around and get out from time to time. There are better botanical options closer to Chiang Mai that I will take visiting friends to in future...