Text: if you're anything like we were when we began, you're probably on a tight budget.

Correct capitalization: If you're anything like we were when we began, you're probably on a tight budget.

Text: facts are the air of scientists.

Correct capitalization: Facts are the air of scientists.

Text: modern technology , high-quality design

Correct capitalization: Modern technology , high-quality design

Text: the well padded backrest can be inclined in 7 positions from -15 to 75 degree; the seat is also variable in 3 levels.

Correct capitalization:
The well padded backrest can be inclined in 7 positions from -15 to 75 degree; the seat is also variable in 3 levels.