I got this one in Jan 2009 and it bloomed twice, January and then in December that same year. I loved her leaves, coz knowing that after the flowers bloom, only leaves are left and at least it has some design of its own. It did not bloom for 2 years, just made leaves all that time, and I was told it will only bloom on new plants it makes. This one is non-sequential, so only one bloom each flower spike..
That's a very lovely photo you have there!!! I saw other ones in an orchid show and they really are so gorgeous!
I got another paph early this year, which was a sequential bloomer, bloomed 3 times on the same spike, unfortunately it went to orchid heaven after summer haaay!
So to answer your question, if they are difficult plants..hmmm I guess it depends...but that is the case with all the orchids most of the time, right?