Help To Buy - Advice please

Hi,

I'm currently considering taking out a Help To Buy mortgage.

I have spoken to our Local Homebuy Agent and have run the figures by them over the phone and they said that there is no reason why we wouldn't be accepted.

The best rates that I have found so far are from Nationwide, has anybody found any other lenders with better rates?????

Nationwide
2Y @ 2.54% +£999 fee
2Y @ 2.94% (No fee)
3Y @ 2.64% +£999 fee
(There are better rates for existing customers and lower fees for FTB's)

I know that it will depend on individual circumstances, but generally does anybody know if Nationwide would loan as much as Halifax or Natwest.

Also, is there there any sort of cap on the rates that lenders can charge as I suspect in say 10-15 years time there won't be many lenders offering these mortgages and I could be left with no option but to pay an inflated rate??

Does anybody else have any concerns that they could share about this scheme as I don't want to make an expensive wrong decision!!!

Any help would be gratfully received.