MasterChief63, ang pagkakaalam ko ang cooling capabilities ng window at split type ay magkaiba. that is what was said by the sales rep back then ha. you should measure the area to be cooled and tell the rep and they will be able to help you with your needed HP rating. i am a bit skeptical as to what you said will service two rooms and it being a 1.5 HP one. most of those we use are 1.5 and it services a small business location with just a few square meters of floor space. i doubt if you could fit two bedrooms in that floor space. that said, do check on your needed HP rating.
as to the brand, haven't encountered problems with 6 installed LG split. other locations are a mix of other brands, some of them are even second-hand (KURIPOT kasi).
a major advantage of split is in its energy-saving feature. one location which had window-type installed then spends around 3.5k on electricity. when replaced with split-type electricity cost now is down to 2.5k. on that note, when choosing between models, do consider its EER. higher EER would translate to a higher saving in electricity cost.