Depends on the car. My friend's Tacoma has the JBL package and it is good enough to where you could leave it be. I know it isn't a BMW Bang & Olufsen sound system but still good enough.
On the other hand, the Flat 460 ... I mean the Mach 460, in my '96 GT, had zero mids and weak bass.
When I was working at Olsen Tire, it was standard to park all cars with the emergency brake active, and either the car in P or 1st gear. We had some clown in the parking lot remote start his truck, and it lurched into another customer's car, and he tried to say it was our fault. We told him to...
If someone installs a remote starter on a stickshift, they bypass the clutch pedal safety switch, usually with a jumper. Remote starter systems usually state "not for vehicles with manual transmissions" because they don't want the liability for someone that remote starts the car while it is in gear.
I'm the "go big or go home" type, LOL! $150 for the line converter (I want to keep the stock headunit) with equalizer, 5 channel amp, JL Audio component front and rear, plus the speaker wire, the amp kit, other odds and ends.
The pictures are fuzzy, but those types of things you have to get at the dealership. Auto parts stores won't carry model-specific steel fuel lines. Make sure you keep a fire extinguisher on you if you attempt to tackle it yourself.
Pens ... <shudders> I can't stand Cindy Crosby ... but I gotta give him credit. It's tough to play with your head up your ass and your nose in the air at the same time.
I dunno why Corolla got shafted on the JBL for premium but it should have been in the Corolla. I would have paid the extra $500 or whatever for the amp, speakers, and subwoofer from the factory and not have to mess with it.
I'm happy with the radio and the nav is quite accurate. Just need more power ... and the system I priced from Crutchfield was $2,500 ... but man would it be epic on so many levels!