booking to go glasgow to orlando MCO via Newark with UNITED, does anyone know if the bags we check go straight through to orlando (then glasgow on way home) or do we have to collect them and re-check them onto the joining flight? and what are they like to travel with, food, entertainment, comfort etc?? thank you all!!! 
We flew from Glasgow with Continental to MCO in 99, 01-06, 10, and then again last year once they were branding under United just to Newark. We've always had a great experience with them, although, that was the Continental days.
Food has always been decent, and out of Newark its really good - helps they part own the catering company of course. Usual chicken or beef fare from Glasgow, and then a snack box before you land with hot sandwich, crisps and a brownie. Coming back its the same with a warm croissant and fruit for breakfast. Free soft drinks but you'll have to pay for the alcohol. The flights to / from Orlando will have buy on board food.
The inflight entertainment system they have now is excellent, a really wide choice of films and TV shows - including some from here. In a trip report I did for a site, I noted 181 albums 175 shows and 45 films from last year. Depending what you end up on going down to Orlando you'll have the same as that or DirectTV where you pay something like $7 to watch live TV, with a huge amount of channels to choose from - and that isnt bad value when you think about it.
Comfort wise again they are good, seats comfy enough, and plenty room, even the seats with the boxes underneath and im 6'2. We last year coming home went for the Economy Plus seats , just as it was the night flight, but there is no need to pay for more room as such as there is plenty.
As has been said, on arrival at Newark you will collect your bags, dump them and off you go.
If you get lucky, you'll arrive at terminal C - the United terminal, where you'll have a 10/15 min walk to immigration, queue there, down an escalator, and collect your bags. When you exit the hall you hand in the customs form, down a ramp, and you drop your bags off there. Turn around from there for the stairs / lift up to the security area. Once through that then thats you, but check the boards as the gates can be bad for chaning there.
However, more often the last while the Glasgow and other first flights have been going to Terminal B, and you'll do all the above, before catching the monorail over to Terminal C. It is a bit of a faff but not too time consuming.
When you come back, you wont see your bags again till Glasgow, and you'll arrive into and depart from Terminal C. You'll also have more time to spend, as you step off the plane, and can walk to the other gate - there is no security to go through.
Newark Terminal C is a really nice terminal, especially the newer part. Best place to eat, if you like pizza, is one of the Famous Famigilia pizza places.
I have been looking at them as an option from Aberdeen does anyone know how much they charge for the economy plus seats?
Last march i was $129 for an exit seat with recline, other seats were $99. I think the price can depend on how busy / time of year / day / length of flight etc. The other bonus of that section is that with a row of seats taken out, and the rest moved, all now have a window, which wasnt the case before.
