I can't comment on any specific product as that would require analysis of the product to be definitely factual on it, products will vary in solvent used, and companies will vary on the freshness of their product.
That said, even in solid form T3 has stability problems. Even some pharmaceutical tablets have run into problems with maintaining potency.
In general being in liquid rather than in solid phase reduces stability. However, different liquids differ.
So far as no side effects, T3 at an actual dose of 100 mcg/day commonly (not always) results in muscle and/or strength loss.
It is not uncommon for liquid products to exhibit no side effects at nominal doses at or beyond this.
There are also cases of individuals getting good results from the specific products they purchased.
One might naturally ask about CEM-Meso specifically. I have been satisfied with their products that I have purchased personally. I have not purchased the T3 and thus have no experience with it. But for the above reasons I'd consider a pharmaceutical tablet to be a preferable choice, if available. If I were going for a liquid I would buy the CEM-Meso based on experience with the other products. But I would refrigerate it on arrival and not expect much shelf life.
I have tried another brand in the past -- the guys that sell ancillaries -- prior to being aware of this problem, and it lacked potency on arrival.
It is entirely possible to not feel an actual 50 mcg of T3, while nonetheless getting fat loss benefits.