 Now that gas is cheap - under $3 in California (of course it won't last) I wanted to update my Sonata Plug In Review.  First - FINALLY - Hyundai made good on its promise to add Apple Car Play and Android Auto via a very long and painful software update (3 hrs+). They also fixed an annoying problem on the LCD display in EV mode instead of a big giant battery it now splits the screen in 2 with the battery on the right and the EV remaining distance on the left (previously only seen in the instrument cluster display) So, there's that. Also something was fixed with Bluetooth, my Samsung phone now pairs very fast and remembers the last App playing audio and starts automatically but it STILL will not stay in Shuffle mode if you have an ipod or iphone, so everytime the car is started its about 50 clicks to go back to shuffle/random play mode sigh.So, the Truth is I have only bought 16 gallons of gas in 5,800 miles of driving, I think that speaks for itself. Even with cheap gas -- I am paying nearly zero to drive all over the place.Since gas is so cheap, I  tried 91 instead of 89 and it made a HUGE difference in the engine's performance. Seriously a big improvement, and I don't know why because Hyundai says do not use 91 so whatever.  The gas mode is much more responsive and smooth on 91.Also, not explained well in the manual, the CHG MODE will recharge the EV battery with 380 volts on the highway in about 30 minutes. The engine is also much more responsive in the mode, but of course there is no hybrid mode working so I only use it on the highway where I can keep a consistent speed.One other weird thing I have experienced, the ventilated front seats (AC) are not very good or mine are defective. I have tested them in a Dodge Charger V8 and they are way better, more air flow and cooler.  Hyundai probably just went with a cheap version.I STILL MUST complain about the awful Blue Link Mobile App.  Why Hyundai??? The app is still slow, slow, slow, doesnt connect much of the time, and it should be free! So I can still see charge info but I cannot start the car -- lol because they want me to pay for it. no wayI have owned this car for one month, and 1,543 miles. I have not bought gas once. The free full tank from the dealer is about 1/2 full, the only time it uses gas is on my way home from work (Toll Road) in Southern California and it switches silently into Hyb mode. But, understand it still has battery left for hybrid mode and its then begins charging the battery.  Unfortunately, my Sonata Plug In (Limited) always shows incorrect battery info.  For example, 30% battery remaining but only 2 miles of all EV mode available. Hyundai needs to fix this and the "stupid" battery gauge under the speedometer.  It has blue and white lines but its so confusing even the Service Manager couldn't figure it out!Vehicle is really nice, and drives great.  HOWEVER -- the BlueLink Mobile App and Service are TERRIBLE!  Most of the time the service is "unavailable" or some other useless error message. When it does work it takes 10-15 minutes to reach my car with the App - Unacceptable Hyundai.I decided to Lease this time because no matter how great a Hyundai vehicle is, their resale value is the worst in the auto game. I know, I had 2 Sonata hybrids and had to pay to get out of them both.  The 2015 lost 50% of it value in 10 months!!! So beware - only lease this car so you can give it back at the end.One additional comment about charging.  You would think in Southern CA where Hyundai is headquartered there would be EV charging stations everywhere -- Nope. They are a nightmare to find and when you do, every Tesla is town is plugged-in for hours.  Also, the charging stations are not free.  There are several different ones Charge + and others that you have to sign up for in advance and get a card to use them. It's really a hassle.Unlike Nissan, Hyundai will NOT allow you to charge your car at their dealerships - really bad PR Hyundai.Overall I enjoy the car a lot.  But no Apple OR Android App integration means old  bluetooth for your phone. And, Hyundai bluetooth is soooo slowwwww to connect to my iPhone and Samsung S7, I usually end up listening to my old iPod I have plugged in. The XM sound quality is horrible, so I wouldn't even bother signing up for a subscription.  One other weird thing, the radio keeps playing after turning off the car (can be configured) but the power windows stop working...lol very weird.  The car needs a usable Mobile App and to charge faster (9 hrs in my garage on a standard outlet and the cable gets very hot too. Sometimes the fan under the hood kicks on while its charging..hmm)Lastly, on a new model with all this technology - -why did Hyundai put plain old bulbs in the license plate holder (and the dome lights). I mean that just seems really like an oversight in my view.  I replaced them with Sylvania White LEDS from Amazon but I dont think I should have needed to.