I bought this mouse after I had Razer\Microsoft Habu for 10 years. Cant number one - square and long sensitivity buttons and the length of the mouse (on Habu they were round and shifted forward). The index finger now needs to be strongly bent. And it's not very convenient. The buttons are moved to the wrist. Cant number two - the side buttons, on the contrary, are moved forward and you need to stretch your thumb to the second button. And it's quite inconvenient. Habu did not have these shortcomings. I want to note that my hand is far from small. For 2 years of operation, when clicking, there was a feeling that the mouse was playing all over. The problem is explained by the design feature of the upper part. (Two halves) Solved by bonding with sealant. After the case became rigid. Standard latches do not provide structural rigidity. Raiser Synapsis version 2 (in 3 it doesn't seem to be either) is poor in macros. There are no return functions for the x and y axes. If you want cool macros like on a4 Oscar Editor, then you are not here.