There are a lot of professional WW's who prefer the Tersa head to the segmented head due to the finished appearance being superior but I think that depends on the type of blades being used. I had to make the choice and chose a silent power head for several reasons, reduced noise, compact shavings & I was totally over having to deal with knicked blades having to be replaced and the carbide cutters seem to last forever.
Laguna seem to have QC problems made worse by their lack of customer service in fixing those issues. Both Hammer & Minimax don't seem to have a lot of QC issues but their customer service can be a problem as well in the US from what I can see from afar. If you buy the Hammer the in handle measurement gauge is a must, it is incredibly accurate and never loses that accuracy and if there was one reason I would buy the Hammer it is the measuring gauge, it makes me smile every time I use it. I haven't got a clue whether my CI tables are flat or not but what I do know is if they aren't the dips and hollows don't affect the results I get.
Laguna seem to have QC problems made worse by their lack of customer service in fixing those issues. Both Hammer & Minimax don't seem to have a lot of QC issues but their customer service can be a problem as well in the US from what I can see from afar. If you buy the Hammer the in handle measurement gauge is a must, it is incredibly accurate and never loses that accuracy and if there was one reason I would buy the Hammer it is the measuring gauge, it makes me smile every time I use it. I haven't got a clue whether my CI tables are flat or not but what I do know is if they aren't the dips and hollows don't affect the results I get.