Sanitas SZA 90 is an affordable, very good sonic toothbrush. After quite an expensive Braun Oral-B had initially Sonic Complete and then uses a slightly more favorable Philips Sonicare, I like the Sanitas SZA 90 for the following reasons best: The Braun Oral-B Sonic Complete is the cleaning performance certainly very good, for me but personally too much polishing action that damages the tooth enamel and can lead to free dental necks. After the on / off switch was broken, I bought a Philips Sonicare. This was by all three electric toothbrushes priced in midfield. The toothbrush has not the high rate of vibration as the Brown or the Sanitas and is very noisy. Personally, I could not get used to the uneven long shaped bristles of the brush head at Philips. The brushing was so very used to and partly the longer quite hard bristles are slightly harmful to the gums. Therefore, I have now bought Sanitas SZA 90, the. High vibration frequency of 40,000 / min and has very gentle and preserve tooth enamel, but very thoroughly purified by the very soft bristles. It is also very quiet. Priced it is even the cheapest of all three toothbrushes and had supplied already 7 Ersatzzahnbürsten included at a cost of 34, - EUR. The cost is usually already the brush alone. All three toothbrushes have an automatic shut-off after 2 min. Sanitas as well as the Brown can be regulated in three stages: normal, soft, massage. I am very pleased with the Sanitas SZA 90 and can highly recommend it further.