Many years ago, before I knew for sure that PE was for real I bought myself a novelty pump without a gauge. Even though it was cheap and bad quality I would probably have had more success with it today, now that I know what to do, but then this forum didn’t exist, hell Internet had not yet been invented by Al Gore :D
I didn’t know what to do though and did probably everything wrong. I lasted a month and then threw it away.
What happened was that I pumped like a madman and my dick looked pretty weird after every 1 hour session (with no brake!!!). Promise me you’ll never do this! I approximate the pressure I then used to somewhere around 10-11 mmHg. I tried with my pump from Lapdist to pump to the level where I felt the same pressure (very close to pain) that I did with my first pump. Seeing the actual pressure I must have been using back then and considering that the recommended maximum pressure in this forum is 5 mmHg I realised that i could have ruined my dong. I was lucky though.
Also the first pump set was really crap quality wise. Cheap plastic, rubber sealing, too large tube for my size, not comfortable at all and a worthless pump. Also there was a hole in the tube that you had to put your finger on while pumping and releasing when you wanted to depressurize - very stupid in my opinion.
The Lapdist pump has a little depressurize button on the pump itself and the overall quality of the unit is excellent. I’m sure both the tube and the pump could last a lifetime if taken care of. You might have to change the seals in a few years but that’s a minor cost and hopefully you’ll have satisfying gains by then :)
What I’m trying to say is that, yes you could get a feeling of what pumping is like with a novelty pump BUT you will probably not like it very much and there is a higher risk of injury if you don’t have a reliable gauge. If you are sure about PE and pumping you should invest in a somewhat more expensive but much more reliable product then the one you mentioned.
Good luck!