not solid, looks, does not hold much computer

I bought this table because it was the longest to arrive as the middle of the bed However it is only 60 cm and must be put to the edge. You can not use the computer in front of us and mouse on the right.
The only positive is that it can be tilted 90 ° in both directions.
It is unstable. The table is highly skewed to one side than the other.
The wheels do not take, they move tipping the table more.
The support to hold the computer is fine. I use it to my tablet (I will not risk a computer that is much thicker) and already several times to slip my tablet (I have a microsoft area - a little thicker than other tablets but still less thick as a computer).
May be better to consider a medical table, more expensive but the surface will be greater, not to lie on the bed and especially for strength.