Compared to the DC brush that are a bit bulky and just so live up to the rearmost teeth, the TriZone leaves this regard damn good to position. - The cleaning reminded by design of course the good old manual toothbrush that lets you to perform the same cleaning movements (up / down) to get between teeth effectively clean.
As a result, there are for me Dual Clean and TriZone practically the same, since the brush surface is very large in both types and thanks to vertical movements then set an even better sense of purity.
No longer meet the old Precision Clean heads me to the effect, but I believe are still perfectly adequate in relation to the price: For 2 more you could take 2 TriZone (13) also 5 Precision (15) get the brush, as I in the store recently realized. - That's "steep", but the new heads are not long on the market and the buyer an attempt rabbits.
Toll I think the fact how to populate the good old "People's toothbrush" Oral B with such diverse essays and thus can bring variety to the pure plaster everyday.
If the fall in price TriZone times, they will buy more often.
PS: The only function heads with rotating models, not the Sonics!
[Update 25/09/12]
The price has improved slightly compared to the other models, ie 2 pieces are no longer clearly to acquire less than 10 for 13 but once already.