Yes, these are normal heat pumps – the only difference is the 3″ quick connect valve that allows the lines to be pre-charged for the do it yourself installation.
Once installed they are fully serviceable as with any heat pump and many local independent heat pump companies are happy to service them.
Note: It’s illegal in Canada for any HVAC company to refuse to service a competitor’s products. If they do they will have committed an act of “conspiracy” and will be in breach of The Competition Act. This carries a minimum prison sentence of 14 years for anti-competitive behaviour.