Obligatory response from a Norwegian: It is utter and pure hell. Words cannot fully describe the agony felt on that side of the border. And worst of all, it's full of swedes.
On a more serious note: It's alright. Your average scandinavian country. More forest than Norway, and more hills/mountains than Denmark.
I think it helps to consider the south and the north separately for this calculation - Sweden has a population density of 23.6/km^2 - indeed quite low, but to put it into context, the north has a population density of approximately 4.9/km^2 while the south has around 50/km^2 - the population is very lopsided. The north is bigger than the south as well, accounting for around 60% of the total area of the country.
The housing situation is also quite bad, it's near impossible to rent if you move here for work (unless your company acts as a guarantor).
The rent-controlled housing queue system is extremely corrupt and long - at least 8-year queues (unless you're related to the local administration). Taxes are also insanely high on workers - 56+% income tax, 25% VAT.
The currency has collapsed since COVID so wages are far worse relative to Europe than before (and let's not even mention the USA).
It's far from everywhere (you're not going on holiday to Russia these days), with few direct flights, and long delivery times for imports.
But still the transport is quite good, there are a fair number of new apartments if you can buy a leasehold (it has its own issues with high fees and interest rates though), and a lot of online services.
Can confirm. Live here and it is a pretty boring country to live in. However it is also pretty stable and safe to live here. So depends what's important to you in terms of living.