My 2d worth...
Plenty of happy Quest 1 users out there, it appears to work fine and is a neat looking unit.
Quest 2 on paper seemed a better combination to me of:
whole of Europe pre installed, I liked the compact size, screen was big enough (just), portable with internal battery, handy size, waterproof and at £360
I could justify the expense.
Sadly, like Twotter, I had problems, poor satelite lock and painfully slow recalc times, often a hanging screen as I was closing fast on a junction which caused too many... "aaaaaargghhhhh...which way do I go..." moments. Got fed up with that very quickly.
Returned it to Garmin and received a 2720 in exchange. Result!!
Huge improvement over my Quest 2, larger screen, fast processing times, it just works. However, bigger unit won't just slip in a pocket, no internal battery so needs plugging in to run, but for my requirements it works well, quick re-calcs and the touch screen is a bonus.
I note that in the two months since I got a GPSR, prices have come down so there are deals to be had, certainly on the 2610 and others.
As usual, depends what you want/need/can afford from a GPSR.
Good luck