I bought the first Braun Oral-b triumph over a year ago. I had read the 'Which' review of it and I was not disappointed and it has lasted me very well, so although I have only just replaced it I have no reason to doubt that the new model will also be as reliable and longlived.
The adjustments made by Braun with this new model are small. The original had 4 brushing modes (clean, soft, massage and polish) whereas the new model has 5 (daily, sensitive, deep clean, polish and massage) I presume by clean they mean daily and by soft they mean sensitive. So actually there is only one difference, the deep clean mode. I found the deep clean did give cleaner results than the previous model and was very impressed with the cleanliness of my teeth afterward. The flossing I always do after brushing as my teeth are very close together showed there was less debri after brushing with this latest model.
Those of you not used to electric toothbrushes will need to learn not to move the brush around like with a manual toothbrush, there is no need. The brushes are readily available and the toothbrush tells you when to change them as it has an intelligent chip in it which monitors now much they are used/ time etc which I really like as I can be forgetful sometimes!
If you can afford this latest model then buy it. As this toothbrush could mean fewer trips to the dental hygienist this needs to be factored into the price. It could be especially good for those of you who smoke or do not like going to the hygienist and of course for those who want to maintain that 'just been to the hygienist' feeling and whiteness.