Brand "cheap" with some minor flaws

When my HP 11C calculator to just over 3 decades departed this life, I have decided to remain faithful to the HP brand and to buy a unit of this company with superficially similar performance characteristics. When unpacking, I realized that I had to make significant concessions with regard to the usual quality and value from its predecessor, which is probably not surprising given the low price of. The keys have no pressure point and act spongy. The storing intermediate results is cumbersome. The most disturbing feature is that the computer turns off after 4 minutes of non-use and stored in the stack calculation process will be lost. The result of the calculation can indeed bring back after the restart by pressing on the Ans and thereafter = key, but only the final result.
Some features that need to be addressed by means of shift, I would have preferred to be addressed directly with one touch, but there also user computing habits play a role and this should not therefore be overstated.
Although the display of a decimal point or comma can be selected, but the numbers are also displayed with a decimal point in the first line when the decimal display has been set. Only in the result line (2nd line) point appears.
It may be that some of the identified drawbacks of me eliminate or circumvent by tricks operation also allowed, but this does not tell the user manual unfortunately. If you open the respectable se manual, one quickly realizes that the German-speaking part are only 36 pages devoted to what is very modest for a device with such a wealth of sophisticated calculation functions. I'll probably find this computer suffice. Nevertheless, with its respectable predecessors, this device has only the company name together.