Servus!
I will also give the Voice of Approval to the CatEye Enduro 2. I have abused the hell out of mine and it just keeps working. Latest incident - left it on the bike overnight during a torrential downpour. Got damp inside, which was easily cured by allowing the unit to dry without the battery cover on. Works just fine now. The difference between the Mity 3 and the Enduro 2 is the E2 cable is more robust and the E2 has multiple wheel settings, one specifically for MTB.
Money well spent in my opinion.