just been reading through what people have said about the smart parts ion, this was my first marker, and still have it, in my eyes its a lovely marker, i cant compare them to another marker because i have only used the ION, its a great marker, well reliable, easy to fix, easy and great to maintain, just treat it with respect and it will show you the same back, lovely marker, i think i paid £150 for mine brand new not to sure was a while back now, but you can pick up a good 2nd hand one for around £100 mark, or maybe less