Hi, thanks for the replays..... so let me answer the questions:
yeah, it uses dishwasher detergente, here in brazil the most commun is Sun, finish has arrived here a few months ago, but is tooo expansive, completely aut of the reality. we have some other brands too, but they're unefficient. the best choice is Sun, cleans well and is payable! the rinsing agent is Sun too and here in Brazil we don'te have the necessity to use salt, so the dishwasher even not have a dispenser to salt.
well, the wash arm has a good pressure, but i think it could have most pressure, couse sometimes the glasses don't get tooo clean...
and, as it don't have an wash arm under the top rack, when u wash bowls or pans in the lower rack, u can't put glasses in the upper rack where is the pan.. I agree that the manufacturer could had put an arm under the top rack, but don't know why they didn't.....
ah, u can use it undercounter too, in an special cupboard, but as we don't have even the pipes to put it undercounter, we prefered to put it over the counter, beside the sink... in my opinion, it looks so beauty beside the sink too!!!