Like most IT training providers, I recommend that you take what they say with a pinch of salt.
They CAN'T guarantee you a job... and you WON'T earn £30,000 + on completion of your training. Also, an MCSE or MCDBA will be little use to you when applying for an "entry-level" position. Your CV will more than likely end up in employers recycle bins as you'll be considered over qualified for the position advertised.
I strongly recommend self-studying for the A+, N+ and MCDST certs. Once you've completed these you'll have a much better "feel" of which area of IT you'd like to specialize in and will save yourself £££s!
Remember, even if you were to sign up with a training provider you'd be "self-studying" anyway. All that these companies do is send you the course material (books etc that are inadequate in several of my friends experience) and assign you a tutor that's inaccessable.
You can buy the course materials for the aforementioned certs from Amazon. The books that you need normally cost about £30; the exams 100.
Of course, whether or not you sign on the dotted line with this company is your decision... I just hope I've highlighted some of the risks of doing so.
Whichever decision you make I wish you the very best of luck!
- Alex