Well it all depends on the work the forklifts do, what kind maintenance you do on them (also is the service guy ok or not) and many things...
I know a few companies who have purchased Heli and will never again purchase a Heli. Bad service, bad quality, cables not clamped correctly together with pins and pulling it out with just moving the cables...etc.
I know also a few companies which are happy with them, but they only work 1-2 hours a day! It all depends on the work and how many hours a day you work with the forklift.
Regarding the Linde and Hyster I think it's all bull****. Either you have a bad servicemen or you have received bad machines in the beginning and problems should be solved with forklifts still in the warranty period. We have many experience with Linde and no serious problems! When problem occurs it's because of poor assembly and not because of the quality of parts! I must say the same goes for STILL forklits which you in Mozambique don't know (or USA). For them it's not allowed to sell it to the states or any other "LINDE marketplace".