Any tub run on 110V is going to have it's drawbacks. Those specs are the max for any tub wired to that voltage, it's all 110 will allow. You can however wire it for 220 if you have the capability. It will bump you up to 4KW from the heater and be far more efficient, well worth the extra cost upfront if you ask me.
Voltage won't affect the pump HP. However, pressure is dictated by flow and jet count. It's a small pump pushing a few jets so the pressure per jet is adequate but not overly therapeutic.
Freeflow's are good little tubs but you have to understand that the brand is there to fill a price point and not much else. They are what they are, not that that's a bad thing. If cost is the overriding factor, you could do a lot worse for an entry level brand. If efficiency, therapy and ease of use are more important I'd probably look into a decent mid tier brand which will require 220V.
Good luck to you.